Sounds like you have the right tires, at the right pressures, and you're towing the same camper. You're saying it did not sway like this when it was towed behind your Chevy, and it's loaded the same way? You didn't move anything heavy behind the trailer axles? It sounds like maybe not enough pin weight, but if nothing changed in the camper...I'm at a loss.
2015 XLR Hyperlite 30HFS5 (mods being performed regularly)
2009 Salem LA 292fkds (gone)
Nights- ('12)23 ('13)23 ('14)15 ('15)31 ('16)25
2014 Harley Davidson FLHX (XLR cargo)
2014 VW Jetta TDI (diesel sipper, camping support vehicle)
2011 Ram 2500 CC 4X4 CTD, B&W Companion (toy hauler hauler)