* When I built my squareback trailer 7+ years ago, the first thing I installed was a 2500 watt Craftsman generator (from the '90s), so the trailer could have power off-grid, especially to power a 5000 btu A/C (always planned for, but added a year after the generator). I added a separate 12vdc system for on-board electronics, with an inverter to supply 120vac via the battery, if the park power failed.

* Before I installed the A/C, I asked a tech at work if the electronic controls of a modern A/C might be affected by surges from the old-school generator, if used, and he said not to chance it, and get a unit with mechanical (rheostat & simple on-off switches, no microcircuitry). So, taking that advice, I found a LG 5012J unit with mech controls, and it's performed perfectly. Still haven't used the generator at camp, though.

* If I were to get an electronically-controlled A/C, or use a lot of ac-powered gizmos at camp, still relying on a generator...the I'd either replace the current generator with an inverter-type ($400-1200 for a 2k watt unit), or get a "line conditioner" (Tripp Lite 2400watt for $210 ) to modify the non-sine-wave power that my old generator puts out.