I would agree with everything I've read here. 2 pair worn in boots w/ 400 gr thinsulate and Gortex, swap ea. day. Smartwool sox (lots). Layers-polyprop, wool, gortex. It can change in a heartbeat out here and elevation makes the weather swings radical. You will have kid like enthusiasm when you arrive, be in shape and start out easy the first few days (you would be surprised how much good hunting is passed up getting too far up and in sometimes anyway) then take on the tougher stuff, the longer you can stay the better. Carry good day gear, enough to SURVIVE on an extra 2 days, if you are dressed in quality layers you would be surprised on how little more it takes to stay out if you have a problem. Extra food, fire making supplies (small saw for dressing animal or fire), compass+ map (even if you believe in GPS), parachute cord,light rainfly, WATER (carry 2 qts. a ridge can be a long way from supply) and if you plan useing nature's supply have a filter or tabs, Giardia sucks! A whistle, phone MIGHT help, mirror, tin cup (cooks dry soup or?) and first aid supplies. Good luck, starting now is the right way to go.