Yeah, it’s that easy. You weren’t hauling a camper, you were hauling way too much weight with the wrong kind of trailer.
That’s got almost nothing to do with carrying a camper less than half that weight up on the truck deck.
Any trailer capable of hauling a 12,000 lift weighs well over 3000 pounds by itself.
You had a 15,000, probably 16,000 pound trailer, with way too much tongue weight.
D.O.T. around here has been really cracking down on that stuff, lately hardly a day goes by I don’t see a landscaper or whoever in a 450 or 550 pulling a piece of equipment on a trailer on the side of the road with a D.O.T. officer “educating” the driver about what you can and can’t do.