Do the easiest thing first. Check the wire going into the breaker. Make sure it's tight. Also, make sure you are disconnected from shore power before doing this. Safety first.
While my daughter was going to the University of Delaware, we used to stay at lums pond state campground in Bear Delaware. No water or sewer, and a few electrical sites.
Reinstalled all the trim in the cabover bunk after having water damage repaired.If your in Connecticut, and Need service or repair. I have a name and number for you.