&gt; Most people wouldn&#x27;t last a week, let alone 3 months.<p>Not even the native people of the area could have done it.  Hunting for sustenance isn&#x27;t a solo activity.  Hunting large game is high reward with high uncertainty.  You probably need a group of at least five people.  With multiple hunters only one of them has to land a kill to feed the group.  And it means there is the manpower present to process or eat all of the meat before it spoils.  Which is what happened to McCandless.  He was a skilled hunter to bring down a moose with a .22 but he only got a few meals from the carcass before it rotted, wasting hundreds of pounds of meat.<p>I can point you to a record from 1770-ish of a native american woman who managed to survive for six months alone in far north Canada, after escaping from her slavers.  The party who discovered her was shocked she could even be alive and none of them had ever heard of such a thing.  (Samuel Hearne&#x27;s journals)<p>edit: Bagging a single moose during the season isn&#x27;t &quot;sustenance&quot;.  It is sport.  If it ends up in a chest freezer, then it doesn&#x27;t count for this discussion.  Sustenance means 100% of your calories come from hunted game.  And sustenance-hunters at that latitude, even with a group, can go a week without seeing any animals.<p>Scaling up what I&#x27;ve seen people do with white tailed deer, 5 people could probably process 800 pounds of moose in two days if they already had stockpiled all the wood.  Groups of 100 could eat it all.  And groups that large were common for moving across the land.