Once installed, I added a shelf between the Hanna cargo carriers. Two lengths of angle steel from OSH. Using existing side bolts on the cargo carriers. Then bolted the plywood to the steel:

A perfect spot for one to sleep. I'm 6' tall, plenty of room:

Another inside shot:

During the Indian Country Expedition, I setup a tent if we camped more than one night in the same spot. I slept in the truck if it was windy or if we were camping only one night at the location.