I love the overall design here where there is the bed/couch that is a bit higher than the floor but here is also the floor space to give head and foot room. However, I would want storage space under the bed so that I can store gear.
Gun storage with this lockable, heavy-duty polyethylene storage box couldn't be better. Installs over the wheel well in your truck bed. Offers up to cu ft of storage space. Includes gun rack inserts for 2 shotguns or 1 rifle with scope.