What if the entire RV park is wired reversed? Or is it always just one or two sites?Moving to a different site is a much wiser choice. As one who made a living in electrical service for 40 years, no way would I do that.
Anyway, perhaps you can explain where the safety issue is by righting a wrong with a special adapter to make sure the RV sees it all correctly. I just don't see any issue with doing such.
In this case, two wrongs make a right.
-Don- Reno, NV