We stayed at a private campground with 15 amp service. You have to watch your power usage. We discovered that the microwave and toaster were fine but when my wife plugged in the hair dryer it popped the circuit breaker.
We did not need the AC but it can draw 12 amps all by itself. You only have 1800 watts to work with at a time
The high power items are, electric water heater, air conditioner, microwaves, hair dryers, space heaters, toasters and some coffee makers.
Option for us include switching the water heater to gas, switch the refrigerator to gas, heating food in the oven and making coffee on the stove.
Most of the time we simply learned to mange the electric load. Using only one or two of the high electric draw appliances at a time.
Good Luck