I'll just add this:
There isn't necessarily supposed to be a breaker at the outlet where you plug in your RV. If it is on a single 30A circuit fed from a breaker in a panel somewhere else then that's all that is needed. Since there was only 1 outlet there and not a 50, 30, 20 arrangement I would guess it was a single circuit.
A lot of campgrounds have a main circuit running thru the park at a couple 100 amps or so and each campsite's pole is tapped off of that wire. When wired this way there should have been a breaker at the pole.
The only way to know is to actually investigate how the park was wired. Again, I think that's a job for an insurance company's investigators.
