Many of the bandit camps and such already have bedrolls though, its almost as if it was designed to work that way and in the end they decided to drop that feature. The mod Belua Sanguinare has a spell that makes people seek out the nearest bed and go to sleep, while it doesnt always work well especially when there are no beds around, I imagine something like that could be made for the camps out there. I have no idea about how hard/tedious something is to do, some of the mods out there are huge and such impressive feats of work that I imagine someone would be able to pull this off even if its difficult.