Boomer has made a good outline of survival, I would just like to fill in a few spots. His words of, " an adventure or a misadventure," is a good way to describe a week in the northern wilderness.
When survival comes up all that modern people can talk about is a gun, particularly a gun that will blow apart wild animals they envision as bent on eating you up. Since weight is always a major consideration and if one had to choose between taking a gun or an axe, I would take the axe every time! And no, I didn't dream this up, I got it from the old time trappers and prospectors who spent all their time in the wilderness, whom I once knew. Actually, these men were very efficient, and their packs would always have both an axe and a rifle in them, but invariably, the rifle was a small, single shot 22 and they would start out with two boxes of 22 shorts in their pack. Their packs may vary a bit, from one individual to another, but every single one would have an axe in his pack.
Getting something to eat is only part of survival. One can live for multiple days, or a week or so, without serious harm if they never had a bite to eat. But you can easily perish and die in one night, from hypothermia.
Lets say it is late fall and you are out in a rain, got soaking wet and you can't get back to your camp. After dark the sky clears and temperatures drops to below freezing. If you can't get warm and dry, you will perish over night.
The one tool that can keep you alive is a sharp axe, even the ones that are about 2/3 size, with about a 2.5 pound head and a handle about 30 inches long, because it is absolutely imperative that you get a fire going, so you can warm up and get your clothes dried.
If you are in the position I state, soaking wet, it is cold and you are not going to be able to get to your camp, it is also imperative that you stop before dark and prepare for the night. But that's a different story that we won't go into.