Every spring I go out to a cabin and spend two weeks. At first I took a supply of canned goods and other stuff to last me for two weeks or more. Now I take enough for two or three days, I got tired of bringing most of the stuff back home.
When I leave the cabin I carry a long switch, seven or eight ft long. Grouse and Ptarmigan are stupid, they think as long as they are still they cannot be seen. It is easy to get within six feet of them before they fly. When they fly, just hit them with the switch and knock them down, usually you will break a wing. Then wring their necks. There is your next meal. Set a few snares, catch a snowshoe hare. For one person, there is meat for two meals. So far not a shot fired. No wire for a snare, use tree bark to make cord, that will work too. Or you can set up a dead fall.
To keep warm, cut standing dead trees. Already seasoned, and left from a big forest fire that went through several years ago. Better yet, take a shovel and pick, go up the river to a deposit of coal in the river bank. Fill a sled with coal chunks and you have a good source of heat.
Drinking water, keep a big pot on the stove all the time and fill it with ice or snow. It adds moisture to the air making it easier to breath, and when you need water it's there. OK you got to strain out the pine needles, they are not poisonous.
I go out there every spring, and these are some of the things I do while there. If need be I could totally live off the land out there.