Thanks for the update, Rob. I returned last night from CO as well. I think I was a few miles south of you. We used the SteriPen for purifying water, and that worked well , but we took tablets as a back-up.
Interesting comment about lack of appetite because I find the same thing happening to me, although we were mostly at 8500 feet. After a few days it did get better. One evening I ate two mountain house meals!
I basically ate one MH granola(my favorite) and blueberries in the morning. For lunch and during the day I carried trail mix, a piece of jerky, and a Cliff bar, plus a liter of water.
As far as walking, at age 62, anytime I am going uphill, I can go about 50 yards and then take a break. I tried the breathing method of really forcing the exhale and that did seem to help. For lateral moving I did well at the altitude we were at, it was just the climbing that kicked my butt.
I can't tell you how happy I was to not have the problems with my leg/knee that I encountered last year. I am positive the pt and yoga that I did this past year really, really helped me.
Hopefully we have another year to try it again. One of these years it is all going to come together. As long as my son is willing to put up with the old man, that is.
Gary