Thanks for the advice, I wasn't sure about water sources so that's good to know!
re: the change of clothes, bivy, and navigation tools... I guess I've been reading a lot of threads on this site about people getting lost, or stranded. We are leaving the portal 2:30am so I was thinking navigating in the dark may be a little challenging.
Good points about the food, I'll take the advice of an earlier poster and bring something I actually like to eat rather than a bunch of cliff bars which is what I usually pack.
