Posted below are two pics of my Apex Trailer, front view and rear view.
I am looking to a three sided panel system to enclose the front of the trailer. A 3 ft wide panel 5 ft 4 inches tall in front of the propane tanks and two panels angling in to the corners on each side capped by a 25 degree slopping roof panel. A aerodynamic shroud around the AC unit on the roof might be good to do also.
On the back I need a second bracket U bolted to the bumper like the spare tire bracket is. I would move the spare tire bracket closer to the outside edge of the trailer. Then I would construct a four sided open boat tail sticking out 2 ft. The sides would angle in at 10 degrees and the top would be a 25 degree angle.