danger will robinson!
I have not found a campground pedestal miswired ( yet)- but I always check
easy to use a plug adapter and a tester*like you find at hardware store.
you want to ensure that you have hot, neutral AND ground and that voltage is below 125- for that I use a volt meter
It takes a moment to check, then you know.
and than you can plug in your camper without affecting any of the electronics, load balancers, converters, chargers etc $$$$