On the backpack, Gregory makes one they call the Denali Pro and I think it's about 7000ci. When I was on Denali this year, by far and a way THE most popular tent, (I'd say probably 90% of the ones I saw), were the Mountain Hardware Trango tent. If you're where you can pull a sled, such as was the lower part of Denali, then a sled would be a great idea and the ones you get at K-Mart or Wal-Mart, etc for under $10 were the ones used on Denali. The comments about the western powder are also correct, as well as how long it takes to make a snow cave, but they are much warmer if conditions and time are right. Good Luck!