A very worthwhile cautionary tale. his troubles certainly began at least by day two. Did he take water breaks? How much water was he carrying - note his lightweight backpacking slant, starting with a pack weight of thirty pounds- how much of that was water? Did he "tank up" in the evenings and before starting in the morning?

I would also wonder about his headgear - full brimmed or ball cap?

It is interesting to note that apparently his strobe light and other signalling measures did work rather well. Nothing is perfect and nothing works in all conditions.