Very nice trip report! Great shots. Almost did that trip this summer, but the plans fell through. I was a bit concerned about getting over the passes and down before storms as well....and my group's older and slower by far than yours :-).
BTW the mushroom appears to be an Amanita, poisonous as well as hallucinogenic,"esteemed by both maggots and mystics" according to David Arora, Mushrooms Demystified.