Portable AC, with a vent out the kitchen window (if you have one) can work. If I was going to add AC to my Trillium
, that would be my choice. Instead, I seek out cooler camping options which here in the mountains of NC is more practical. Florida, not so much. Most of the vintage FG trailers will not support roof air.
There is a very strong market for vintage Trilliums right now, might consider looking for another different brand with AC. The Casita
13s had a simple AC set up, in the front corner that worked well.