A GPS? I don't even own a compass. Wasn't stressing as much as how much further was I going to have to go and how close would I be if I only hiked so many hours. I think like you said, second guessing each other was the biggest concern. He thinking I would be able to go as far and me wondering if he made it "X" amount of distance. In Lassen Park, I have had to catch up to folks who went in the day before over the snow, but caught up to them just as they were leaving their camp, that was cut and dried as we were only on the main road thru the Park. Off to work.