AFTER you check for a cut wire under the floor (remember the wires are not secured and could have pulled apart after the cut and be laying on top of the underbelly covering):
The exterior outlet is fed off the same power as the kitchen in my camper.
Check the GFCI (you did); the in-camper breakers (you did but check again); the house breaker powering where the camper was plugged in; reset any power monitor (surge protector).
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW