My Ribcraft 4.8 came with an overall camping cover which the previous owner had made professionally. It fits over the bow tubes, consul and a-frame and has a door on the port side and at the rear. Bungee toggles are clipped to the lifeline fixing points and a draw-string goes all round the bottom to the stern where it fits over the pointed stern tubes
I would imagine it's quite cosy inside but not a lot of room to lie down owing to the limited space between the consul and the inside of the tubes.
Mind you, after a day on the water, a good meal and a few beers, you could probably sleep anywhere
If I can find a picture, I will post it here.