We just did WY this past October. Make sure you start running or walking at least. We hiked 68 miles in 6 days and the terraine is crazy in places. I’ll be honest, I packed light just taking Binos, knife, shooting sticks, GPS (must on public land), good boots, good socks to keep feet dry and plenty of dang snacks. Didn’t really take anything that I wouldn’t use here. I ate more crap out there in 6 days than I eat in a year at home.