If you're into doing extreme things like rock climbing, it seems reasonable that you'd also be into sleeping in an extreme way. This hanging tent should fit the bill.
This tent is designed not to sit on the ground, but to hang from a branch or an overhang, letting you sleep when there's no flat ground around. You'll need to have a whole lot of faith in the rope and general construction of this thing, but I suppose on the bright side it'll make it a lot harder for animals to eat you while you sleep. This is why when I go camping, I sleep in a hotel in a city. It's just safer!