You need a good WD hitch. Is it absolutely needed? No. It will however help with the sway.
I haul a 32.5' Rockwood signature ultra-light with my F350 Dually and use a Fastway E2.
Popular choices include the Equalizer E4, Fastway E2, and the Andersen.
Equal-i-zer 4-point Sway Control Hitch, 90-00-1000, 10,000 Lbs Trailer Weight Rating, 1,000 Lbs Tongue Weight Rating, Weight Distribution Kit Includes Standard Hitch Shank, Ball NOT Included
https://www.amazon.com/dp/B004TR8F5C..._7z40CbQCVFQR4
Fastway Black 92-00-1065 e2 Hitch-Trunnion, 10K with 2-5/16" Pre-Installed Ball
https://www.amazon.com/dp/B01MDMEUJM..._EA40Cb4140Y42
Andersen Hitches 3324 | 'No Sway' Weight Distribution Hitch | 4" Drop/Rise | 2" Ball | 3", 4", 5", 6" Universal Frame Brackets | Includes Sample of Bug Gone
https://www.amazon.com/dp/B06XY9SCNL..._jB40CbA1TYVBG
Folks will argue all day long on which one is better. I personally don't think you can go wrong with any of those.