I had no idea that the iPod wasnt supposed to be used over 10k feet... worked like a charm for me. others in our group used their iPhone and had no issues.
Personally I think that the more time you spend @ altitude the better off you are. We just stayed two days because we wanted to have a few days to relax before the hike, your plan sounds just as good to break it up into two nights on the trail. Good luck, as I mentioned before, I had such an amazing time, and can't wait to do it again!
