I keep thinking I'm being too hard on the guy (this man and others this sort of thing happens to).
I was a Cub Scout, I grew up in Alaska, my Dad took me camping, my Mom always had extra clothes for us in the car, I was in the Marines... I had all these opportunities to learn these things, the basic skills of planning and woodcraft.
But the more I think about it, a lot of this stuff I was not just "shown", I also "read".
In the outdoors section of the paper, in even half-assed researched novels and stories, in "Field and Stream" or "Outside" magazine ad nauseum.
There's no excuse for being so ignorant. Anyone, literate and moderately well read, should absorb this kkind of thing if only on a "that'd be handy to know" level. Anyone who can plan a trip should be able to think of a list of stuff to bring that covers realistic negative contingencies.
I noticed in one news sites (MSNBC I think) "winter safety" list of things to keep in the car the mention using floor mats to keep warm, but not to bring warm clothes and appropriate footwear.
That alone, in those conditions, could have let the guy walk out, uncomfortable but alive.
People, even intelligent people, just don't THINK anymore.