Been on vacation for 10 days now. 4 total campgrounds. At first three, Fort DeSoto State Park in Clearwater, Fort Wilderness at Disney, then one in GA while hooked to shore power had no problems run...
For what it's worth, when both my ac units are running, they draw about 19 amps. That leaves plenty for anything else except the electric water heater or microwave. If I turn the microwave on, the EMS sheds one ac until the microwave is done.
The OP needs to move to a better park or to a site with better wiring.