I'm kicking myself for not thinking of Panic In Year Zero. I recorded it off Cinemax a year or so back. You're right, it covers a bunch of survival relevant topics. All you need to do is replace the somewhat dated premise (Soviet attack) with something a bit more contemporary and you'd still have a topical movie.

I also liked William Holden in The Earthling. Ricky Shroeder's parents get killed when their camper goes off a cliff in the Australian rain forest. Holden's character, on his way to die alone in the forest, finds the boy and teaches him how to survive the wilderness.

Ed