Advice on a Class C sizes..... 26' or 31'

One more floorplan to look at, though likely beyond your price range, is the single slide Coachmen 26QB/27QB (depending on year). It has full couch, dinette and queen bed in a 26' body (28' bumper to bumper). Yes it's a corner bed, but sideways across the back, giving it better access than typical. Certainly much better than the truck camper we came from. Also, we've found the private rear BR with hard door (shared with bath) to be an important and unique feature in this length. Having some sound separation when needed adds a lot to family livability.