It was the same for me. I started reading it late one night and couldn't put it down until finished. I've hiked some of the areas in question and it is indeed some remote terrain. Sad part is they were only about 4 miles from the Geologist Cabin back in Butte Valley. Had they simply walked back to the valley they would have had shelter and good water. Eventually, someone would have come along and their lives would have been saved.
They had the Geologist Cabin's stolen flag in their rental van, which is proof they had been to the cabin, where it is hard to miss Anvil Spring. This sad story is the result of one clueless decision made after another.