I think you'd subconsciously stop doing that. You do get larger platforms that double as tents. But whatever you take up, you have to climb up with, so the simpler, the better. My concern would be getting cold.

Ah, I see it's actually a ledge and not one of those wall bed things (<-- the technical term for them)

They’re strapped and tied in if I recall

I'm a rock climber and it just seems really cool, also I'm sure it's some cool multi pitch climbing involved