AWTtrekker wrote: My food is based on a daily intake of approx 13000kj including plenty of protein and slow burning carbs so should be more than adequate, I will be carrying some spare food though as well. .
I work on 15,000kj per day and still loose weight. I am 6'4" however

. I try to average 2,000kj per 100g of food - which is not easy.
Current baseweight for a generic Tassie hills trip is 10.4 kg. Main luxury is a bombproof, heavy tent (Hilleberg Tarra) but work on that being shared by two.
Definitely worth fiddling as much as you can to save some weight - i have been for years and whilst the savings are incremental, over the years have added up to kilograms.