You probably mean you have a 'Pro Series
weight distribution hitch', correct?
You'll probably need to check into the friction device(s) that Pro Series offers for their hitch. I'm not sure how some other brands would work with what you already own.
I'd also suggest to be sure your tires, truck and trailer, are inflated to the maximum shown on the sidewall. Doing that reduces sidewall flexing and often makes a big reduction in sway and your tires will run cooler.
Have a great trip in your new trailer.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.