All the electrical circuits are circuit breaker protected with the appropriate amp rating for the wiring to those circuits. And you have a main 50 amp circuit breaker for the incoming power. And, of course, there is the park power pedestal 50 amp breaker. If you exceed the amp rating of any of these that circuit breaker will trip before damage is done.
If you add devices and it trips one of your circuit breakers then you will know that there is too much running off that breaker. The you can try another circuit. If your breaker panel has spare slots, you might add a new breaker and run new wires to new outlet(s). And the 50 amp park pedestal almost always has a standard 20 amp 120 vac outlet. Use that with a good extension cord to run the outdoor freezer.