The 6.5 and 7 PRC are both great cartridges. The 270 WSM is also a nice cartridge if you are interested in a 270. If you hand load, you will be able to develop a load for your purpose.
Wall tents are really nice, can be heavy to carry. Cylinder stove is the way to go. Just need to mess with wood and keep it stoked. Davis tent or Montana canvas. Make sure it is big enough for gear stove and people, especially in snow or rain.
You can get a little more velocity/energy from the 6.5 PRC over the 6.5 CM, while still maintaining very manageable recoil. Use a break or suppressor and it is a real pleasure to shoot. If you are interested in using it for hunting, I would go with the PRC. The 270 WSM is an awesome cartridge as...