BigRedDog: As the brain cooks rapidly under heat..I'd go a step further, and print a google map and take it with me. mark north on it. doesn't have to be exact..eventually one will hit a road or a canal to walk along. That's just me. Of course, the Mark I mod 0 reasoning system must be somewhat intact or you might not read the compass correctly. The most important rule I think needs to be reinfored is keeping the brain out of lock-up mode.
If that's accomplished, then one might be able to get rescued with nothing at all, IF the individual has educated themselves on
basic survival-rescue techniques, and hopefully practiced a few beforehand.