A 15 amp circuit is only rated for 80% of that, 13 amps... I would never plug anything in that uses that high of rating into a camper.. You are better off using a 10 ga. extension cord in the power ped. Some of them have 20 amp receptacles in them and that would be so much better. Besides if you blow a circuit, you are better blowing the campgrounds and not your RV's.
Just me personal and experienced opion.