You CAN do it - either full-time or just for a "season".
I spent 12 months living in that fashion in the High Arctic - mostly alone, and in a log/plywood cabin ( A local Inuit friend's) - the only thing I had extra was gasoline/petrol, and ammunition for rifle/shotgun. I resigned from my job, and wanted to see how easy it was to live up there and alone etc. I had a yearning to just "live off the land"
I had obviously modern luxuries as a sleeping bag etc, but the Cabin was rudimentary and plain. There was no nearby help. I had both an HF radio and also a Sat Phone for emergencies. I spent a full "season" up there by myself. Summer,Autumn,Spring, and Winter. I was visited a bunch of times and my visitors brought me nothing but petrol and ammunition, and also the odd food "treat", however hardly enough to add to my diet etc.. I had 3 firearms - a 12 gauge semi-auto shotgun, a Number 4 Mk II Lee Enfield .303 rifle, and a Ruger 10/22 rifle.
I also had an ATV ( an old 250cc Honda piece of junk), and a snow mobile ( Bombardier/Skidoo 500cc) and a small Zodiac inflatable with 25HP motor.( I took the Zodiac up by skidoo in spring and dumped it in a nearby lake, so I really had to leave it there until the following winter/spring, and then collect and take it back to Tuk. - Without these items, I could have still more than managed to fish/shoot/acquire food to keep me living - they just made life a lot easier. Had I had nothing but footpower I could have easily kept myself sated albeit have to expend a lot more energy to go to locations to hunt and fish. At times I had Caribou within feet of my door at the cabin. I had inquisitive seals come right into the creek to catch herring but also see what I was up to. Almost every lake up there is 110% full of fish - go on Earth and check out how many lakes there are up there, and they are all full of fish.To "harvest" ( yes shoot) Ptarmigan all I had to do is walk across the creek and go and walk around the small bushes and they would hang out there. Easy to shoot a dozen in an hour or two. Caribou come and go. They have patterns and also seasons. Somedays they were literally within feet of the cabin, other days they were a few km's. But consider 1 large male can provide a few weeks of food, and some days I could easily shoot 6 or more if I wanted. Seals were "extremely" difficult to catch. They have excellent eyesight, but their downfall is that they are super inquisitive - so come and investigate things and then you can catch them. That is in summer when the ocean is water. In Winter - it is a totally different game, and I was unable to catch even a single one.
Everything else I did was living off the land. I ate Arctic Char (Iqaluuk), Ptarmigan(Aqiggiq), Caribou and also Reindeer( Tuktu),Ringed Seal(ugyuk), Herring(Iituuq), Arctic Cod (ïgark), Lake Trout( Iviitauuq), Seaweed (kuanniq), Mussels/Clams (uviluk), Apiks (cloud berries), Blueberries, cranberries (kimminnaq). I also ate Nayaqs ( Sea Gulls), and their eggs.
I was living North of Tuktoyaktuk in the Northwest Territories of Canada. I will add a photo from Google Earth so you can actually see the cabin itself. The exact Google Earth co-ordinates are here: 69degrees 40'28.96"N 132degrees07'41.49"W
I also flew up my best friend at the time.He was living in Narrabeen in Sydney,NSW and I convinced him to come up and live with me for 3 weeks over the summer/fall. Later, at his wedding, he spoke about it and said it was "the best 3 weeks of my entire life".He has some issues with the weather, and also being a person who has lived his whole life going to a supermarket to get food, had some "difficulty" adjusting to shotting, skinning, gutting and preparing meat - Caribou.
Winter was quite difficult due to having to chisel through 8ft of ice to get through to water to fish, and also to get fresh water to drink. Although the local Inuit are quite adept at catching seals in Winter, for me it was almost impossible to learn in 1 winter. Fishing is easy - EVERY single lake is filled with fish, almost every cast you catch a fish, you can catch a few hundred fish a day if you want during summer. In Winter it is total hit and miss through a small hole in the ice.You can spend hours "jigging" through the hole and get either nothing - or tens of fish. But learning how to fish and where to fish certainly makes life easier.
In spring, Ptarmigan abound - you can catch 20+ a day easy. Also you can catch ( shoot) Arctic/Blue/Silver/Red Fox - and eat if you want, plus Arctic Wolf and Wolverine. - But I never ate them. Polar Bear in some places - 1 big male bear can not only provide clothing for many years, but enough meat for easy an entire Winter/Spring. However even though I came across numerous Nanook/Nanuq's - I never shot any. To be honest as a Qallunaq ( white man) - I would have to go through an "outfitter" and pay for a hunt. It costs US $50,000 +. I could have gotten around it by having my partner/girlfriend at the time saying "she" shot it - however I never had any real reason to kill one of those majestic and kings of the Arctic.
What McCandless did was irresponsible. He thought he knew it all, was ill prepared and in an area that suffered from big spring run off snowmelt etc.
Most people think "up North" is a wasteland, but actually it is much easier to survive up there than in many other places in the world.
I have travelled extensively throughout the Arctic - in Canada, Alaska and Greenland. The movie actually is based on an area around Healy - not "really" remote.
Anyone of you that read this should and I totally encourage that you watch the documentary about " Dick Proenneke" - I know many of you will have done this and when I hiked the 6ft trail a few months ago ( where I met the AWESOME Phil UL ) - what a great guy, I also on the first day in the Megalong at the 1st camp - met a guy and we camped together and got talking, we spoke about Dick - and I challenge anyone to say anything but "gospel" towards this guy -0 he is amazing.
Anyway I will post a tonne of pics of my 13 months living up in the wastelands, and way apart from any help - even though I had a sat phone etc - real help is a long way away ( depending on weather).
I also spent 9 months living in Grise Fiord - yes look it up - arguably the MOST REMOTE community in the world. Someone actually prove me wrong in terms of locality, population et al. When I was living and working there - 126 people in total - I knew them all.
What I am trying to say in this total post - is not to give myself any accolade, but try and explain that just like the movie - DEPENDING on where you are - you can easily live if you want - but the biggest thing I found out is that to live solo and "IN the Wild" you need to have a certain attitude, live in an area that support this kind of living etc. Here in Australia, the longest I have tried to live in a semi-wild scenario close to what I did up in Nunavut, was in Kanangra Boyd. I spent 6 weeks in total, I caught Trout, Yabbies, Tortoise,Macquarie Black Perch, and European Carp. I also almost managed to catch a feral pig by hitting it with an axe - other members of this forum can attest to this. Had I actually taken certain traps etc, I could of caught many birds, rabbit etc. - HOWEVER, I do not think for one moment hat it is easy.
Anyway would love to continue this topic - I'm no Bear Grylls et al - but I honestly think that you can actually live in the "wild" - but so much depends on what you have and where you are.
McCandless had a .22LR I think - under equipped for that area. Where he died at the Magic Bus near Healy isn't actually that far away from "reality". He was incompetent, idealistic and also just not equipped and not educated enough for that kind of life.
It is great to actually want to live the lifestyle, however you actually need to have certain skills to enable it.
Anyway, just my lil opinion........

- Google Earth pic of cabin

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- fresh caribou
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- collecting wood from the shores of the Arctic ( beaufort sea) ocean
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