Great walk although I am yet to finish it.
I have taken Creekton and Peak Rivulet Roads in the past. They are all logging roads and are dirt but fairly smooth. You will get there the way you have marked though it might take a little longer.
First time went I got caught in a blizzard and began making snow cones to mark my way out off the plateu. Due to the icy rock hoping at the end I decided to turn around as I was going solo and didn't want to twist an ankle with no assistance!
Second time I went straight after finishing a night shift and was totally wrecked! I again got stuck in a blizzard, this time I had borrowed a friends tent as I only had a 3 man at the time. I planned to stay the night and return the next day. Anyway it turned out my friends 'tent' was a beach pop up style tent. Useless for snow! I slept for a very short time and went back down to the car in the dark. Not the greatest trip

I now have a great tent and am looking forward to finishing it next time round. A great looking peak when it is covered in snow!
Enjoy the trip, I'm sure you'll love it.