Our 34' does ok with the doors open and all the ac air directed to the rear. It would not be anywhere near adequate on a hot day in the open sun with the rear door closed. I am seriously considering taking out the rear fantastic and installing another ac in the opening. The new ac would have a heat pump not a heat strip. Just my 2 cents worth.
Keep the shiny side up.
WBCCI # 348
Past Region 3 President
Past President Tidewater Unit 111
Rick Bell in "Silverbell"