We just changed cord styles from hard wired to marine twist on type like many of the newer campers use leaving us with a 30A cord with only the male end intact. Went to camper place, purchased the female end and who's it up which gave us a 30A extension cord. Were you to do this you could use the appropriate dog bone or other adapter to use the 120 outlet. Still don't overload that circuit at the box but at least you'll have a heavy enough cord for cheap. Right? Or would this actually Fix your issue completely. If your converter is dead, well that's another matter and beyond me. I use the pros on anything inside like that which might run something at the least n or burn the camper and me up.
