Join Date: May 2009
Location: Behind the Face Mask
Don't forget you sleep at or near sea level. That makes a difference. I sleep ~1300m. I know when I lived in Van & did Kilimanjaro, had problems around 3600m as well. It is all about acclimatization -- start hiking lower, and take more time. That's all there is to it.
No for GPS; didn't take my Garmin, and my watch is non-GPS (which I prefer). I thought about Garmin but after Nepal was traveling another 6 weeks through SE Asia & tried to minimize amount of "Nepal only" gear. Charging logistics had something to do with it too.