“Hunker down in shelter, doing little but eating and sleeping.”
I used to watch some show/contest called “Alone” or something. Most of the episodes were on Vancouver Island in the Pacific NW. They leave them with some supplies, tarps, axe, etc. at various points on the huge island. Whoever lasts the longest won $500,000 or whatever.
Some built log cabins. But that takes a lot of energy, and as winter sets in the food (mainly fish) goes away. One year an older guy won. He dug out a small hole in the side of a slope, put in pine boughs and covered it with a tarp.
He spent the first part catching fish and smoking them iirc. Most of the show he just spent in his tiny burrow sleeping. He won - stayed out the longest. (Many of the winners would go 70 to 80 days or so - dropped into the woods in the early fall.)
How much weight do the winners lose?