White knuckles for 600 miles!

First long tow with new camper and it was horrible. I cannot seem to get this combo anywhere close to what my Surburban and other camper felt like. I'm getting pushed by everything from big rigs to small cars. I felt it some on our first trip but that was no interstate. No traffics and I'm fine. E rated tires, Bilstein shocks. New B&W hitch on truck. Reese dual cam is adjusted correctly. Been towing since 2001 and never had a more stressful trip.
I had about 20 gallons of water on board and the tanks go all the way across so some sloshing could be a factor. Tanks are in front of axles.
Is the Dual Cam up to the challenge of a 32 footer? Do I need to start looking at PP's or Hensleys?
I've never felt bow wave effects like this before, I'm really fighting it in some cases. Speed is average 60/65 mph. I've not had it weighed. I've seen F-150's pulling this camper!!! Not sure how tongue weight could be too lite on this beast.
Sorry for the ramble, just trying to get all the info in. Might be a while before I can reply.

Go to the scales and get 13 percent (approximately) of the trailer's total weight on the tongue. Start there and if it still has some sway after that then look at the hitch adjustment. Dual Cam is an excellent hitch but it can be a little work to get it 'just right'.