Tragic. I hated hearing about this as well. The one thing that I keep questioning are reports that they read the map wrong - more than once? But he felt that he could head to the river and follow it down (level headed thinking). I think I would have tried harder to orient myself in the four days of waiting - well he probably thought he had, huh?
I'm also having trouble understanding the S&R teams not hitting roadways. I know I wouldn't have thought (well maybe) to burn tires for warmth and smoke. But what/where were they looking that they missed them at a fork in the road??
Also, I noted that the MSN advise further down the page was lacking. Under "what to keep in your car" they neglected to list: blanket, extra clothes, candles, matches and food. Maybe we live closer to snow emergencies here in western New York, but that's annual survival car fare in our family cars (well, we could get stuck on an expressway and not get home for days!!).
Anyway, very heroic - both parents. What a tragic loss.