I remember seeing an episode Ray Mears did on islands. He interviewed some of the first survival instructors for the military back in WW2 I believe, that specialized in pacific islands. I may have some of the details wrong, but at the end of the episode he asked the guy the age old question of "what is the one thing you would you bring if you had a choice and were going to be stranded on an island?" The man replied "a brunette". I'm going to have to say that's the best answer I've ever heard to this sort of question.