Hi Dar,
As I said before, you need to contact the park.
If the issue is low voltage then just don't run the air conditioner.
If it is intermittent failures, my reaction is "so what?".
If it is high voltage (rare) then a good energy management system would be useful.
I don't use an energy management system, nor an autoformer.
I solved these issues by having a good sized inverter that can run any of the high wattage devices in the RV.
I do protect the converter from surges (cost $2.00)--which means that everything "down stream" is also covered.
When power is "flaky" I plug in only the converter to shore power, which can operate between 95 and 132 volts, and I run the RV from the inverter.
I always check the shore power before plugging in using a kill-a-watt meter and polarity tester.
If you want automatic protection, it may be better to look at surge protected autoformers, before using something that cripples the use of the electrical system by cutting off the power at what may be too low a voltage to prevent damage to electric motors. My comfort level is 109 volts or above.
kill-a-watt
watt meterOutlet tester.
outlet tester