I'm pleased with all the ideas and help with this problem. Thank you Francesca and Eddie for the photos of interior support ideas. I am pretty handy with metal for I have a metal shop where I do custom utilitarian and artistic work. Since I do have a powered vent in the a/c space there probably is not support, even though my Scamp is a 2000.
Thanks Donna for that info from Scamp on a/c units. My unit has bunks in the front not a closet, also the storage area under the cushion next to the door has been commandeered for my inside battery
I cut a hole in the floor and lowered a metal pan down 5" inches to fit a size I 27 plastic box. I then cut a vent in the floor and a side vent high up for air circulation. I also seal the box and ran a small vent hose from this to another outside vent. I am using an AGM type battery
so it should be safe. I did the battery
change so I could install dual LP tanks next to trailer body and add a metal storage box in the front next to the jack. I was forced to remove the sewer tube holder from the front to gain enough room and add a 5 foot storage holder under the frame in the rear.
OF course this involved me having to replace the wood on the bench to make a third hatch access to this sealed battery area. I
I also replaced my Magnitec converter with a Power Max Boondocker 35 amp to help battery charging. I wired in a sealed Accessory plug on the outside by the door to plug my suitcase solar
charger in when camping.
I have been spending lots of time on this unit. I need to get everything done soon so my wife and I can go camping. Thanks