Sourdough

After 40 years in Alaska, much of it remote, I give the following advise to those who dream of: Living alone in the wilderness off the land.

Study: Read everything you can find written FIRST Person, by those who did it in 1886 to 1936. Spend one year reading, studying, and get a good magnifying glass with which to study photographs of the period. Make notes, what did they wear, what tools are present, how did they feed the dog team, how many ways too build a cache, etc..

The good news is that much was recorded by survey parties, and Federal Judges, Missionaries, and a few educated prospectors.
It is doable, but the physical pain and suffering, the mental anguish will be beyond anything you can currently comprehend. However the reward, even if you fail, will be beyond anything you can currently comprehend.
The key is to study those who really did it.