My parents live in a town of 650 in extremely rural Southern Illinois. Their house is in the middle of a river bottoms, and the nearest neighbors are roughly two miles away. It's a pretty ideal spot for a worst-case scenario with plenty of game, water, and cover to stay protected. Getting there from across the country would be the big issue.
I've been a pretty active outdoorsy-type my whole life, and I'm pretty confident in my abilities to hunt, trap, fish, build make-shift shelters, etc. since I've been doing it my whole life.
What scares me is trying to do any of that on the move or without modern equipment available. For example, even with modern trapping equipment, it is extremely difficult to trap game. Trying to do it with make-shift snares and other types of traps is almost inconceivable to me, let alone trying primitive fire-starting or anything like that.