There's been a lot of good ideas here. Sorry I'm not crediting individually, but here's what I've learned so far:
--The AC MUST pull heat out of the air in order to pull water out. The lower the temp the tougher it is to pull heat out, never mind the electrical inefficiecy.
--The thermostat can be spoofed at the unit by jumpering.
--The thermostat can be spoofed at the wall with a tiny 12v bulb.
--The Coleman Power savers can cycle on and off completely, on Auto (doesn't solve the whole issue).
--I also learned that P Tuna is as willing to spend the park's electricity as I am, in pursuit of dry comfort. I may just try a heat bulb inside the AC ceiling intake!
Thanks to all!
