I would like to have a work top with side access storage like shown in other posts. However, we use the truck as an "escape pod" leaving the camper behind when we want to go off road or into areas where a trailer isn't convenient. Thus we need to open the windows, with screens for ventilation. We have a camper couch back there which folds flat and sleeps two. When upright, half the truck bed and the top of the couch is available for stuff as well as space under the couch. When disconnecting from the trailer we just move a few things from the truck bed to the trailer floor and we are free to off road roam. I sometimes wish that have bought the side mounted, swing open doors but they were expensive. On the other hand, with the trailer attached, that kind of door can get in the way.