I'm not very experienced with this game..but from what i know beds are not used so much, only for travel weariness.
What do you think about adding a bonus to healing, while sleeping in bed...and maybe, if you sleep at least X hours ( lets say 10 ) when you wake up a very little bonus to hunger (not sure at all about hunger, only healing could be enough for me to add).
Sorry my English, i hope you can understand...let me know what you think about. Cheers