This is one fascinating thread. I guess I'll toss in my 2 bits worth.
As a kid, I was in Air Cadets. I started off in 24 Red Deer, where one of the things we had to do, was outdoor survival training. The CO's logic was that if we all grew up to be bush pilots, we'd know how to stay alive & as healthy as possible, in all sorts of conditions.
As such, we trained out west, near Nordegg, Ab. All seasons. We learned everything from how to snare small animals, to making fish weirs and of course, first aid.
Of course, being the smartass I was, I and 3 friends got together for a "winter survival exercise" that lasted nearly a week. We had to survive off the land... So between the 4 of us, we managed to make a blind, a bow & arrows & one of the guys shot a deer. So we had venison the whole time.

Of course we got in hell for it, but we rationalized it that "we're living off the land in a survival situation. (the guy, can't remember his name now, years later) has his license and tag, so we're covered for the legal hunting aspects for the most part. We were hungry, we decided one deer would go farther and keep us alive longer, than a couple bunny rabbits or squirrels". Suffice to say that the rest of the folks "stuck together" in one big group... And after a few days of next to no food (by the second evening, someone took mercy on em & gave em IMPs) they were pretty vocal in their moaning when the 4 in the group I was in, started cooking breakfast... We ended up giving about 1/2 the deer to em on day 4. Of course, we kept the best cuts.
The big thing though... If you're in a REAL survival situation, don't try to merely survive. Try to THRIVE. You'll be more fit & healthy when you're either rescued, or have to find your way out of the bush to civilization. Having the training, and PRACTISING it, is essential. Even now, I try to get in a bit of backwoods camping whenever I can, to brush up on some of those skills.
If in doubt, one book everyone should have with em (preferably double zip-locked) in either a bush plane, canoe or 4X4 or even in a backpack if packing in, is the good ol fashioned boyscouts handbook. So long as you're literate, you're set... And the pages not essential to survival, work wonders as tinder for a fire.
L