Question: Under the code 15/20 amp outlets installed OUT DOORS or in areas where water may be present need to be GFCI protected.
now there are two ways to do that,, many just use GFCI outlets (you know where those are I suspect there is one in your RV's bathroom most likely)
But you can also get a GFCI circuit breaker.. one place I park about half the 30 amp outlets are GFCI breakered.
DID the installing electrician put in a GFCI breaker?
HOW to tell a GFCI breaker from a non- GFCI breaker
It has a TEST button, it's GFCI.