I have a Landmark which probably has the same storage space as your unit and I also had a lot of dead air space. I built stacked wooden drawers about 16 inches wide and 59 inches long. What I did was lay all of my items out and built the drawers to fit them. In the drawers I fit items like a folding picnic table, folding hammock, two bag chairs, and misc. items. I screwed the drawers down so I can pull one draw out at a time to almost full extension. The drawers slide on hard wood rails which I waxed, so they slide easy. I only built them 16 inches wide so I can still use the TV mount. Cost was about $90 instead of several hundred dollars for the storage drawers you can buy. I left enough room on the other side of the RV so two folding chairs and a folding dog pen fit on end. There is also enough room to fit stacked two storage buckets with all of my other supplies. Nice to finally get organized.