A single AC on a 32 is a tuff one. Some people carry a portable 10k and vent kit it out a window. Some hot climate folks carry them in the toad. I would not carry something that heavy inside the rv to transport it.
I made solid foam insulation covers for all my windows. Cut them a little bigger than the window so they fit snug and be held in place by the shades. I cut a square about 12X12" so I can see out. I covered the square with clear shrink-film window material which sticks in place. It helps very well in the heat and works when its cold out to keep the rv warmer. I cover my roof vents inside with those foam inset pillows. They have foil on one side. For summer/winter use.
Park in the shade if you can. I would also think a white rv opposed to dark painted rv would also make a difference.
https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/27054659/print/true.cfmI just want to add that when temps hit the 100F mark things seem to become harder to cool.