» Wed May 30, 2012 7:41 am
Sleeping in a bed you own gets you the Well Rested bonus, which makes your skills go up 10% faster for the next eight hours. Sleeping in a bed you don't own (bandit camp, etc.) gets you the Rested bonus, which I assume is weaker but I've never tried it.
So it's a nice little bonus, but not at all necessary.