Extra wool socks!,
How far are you going to range from your vehicle? Are you staying in a camp setting?
My 1st year hunting in Colorado we hunted the 3rd rifle season. Cold wet feet was the biggest headache. I carried a mini expresso maker in my pack.
Water jugs need to be tipped over at night. Canteen had to be in sleeping bag with me so I could make Gorilla milk in morn. Good FRS 2-way radio's w/weather are a must.
Are you in a limited area or State wide?
Any cow tags?
Make sure you understand Co's. No party hunting reg's.
Good luck.
Elkman, Your high altitude cation is excellent. I am amazed with your own sensitivity, I thought that was just for us low-landers to get hit with it. I live @ 800ft.