look on the hitch itself to verify the rates. You'll find there is a big difference in the weight capacity with and without a WDH.
I have towed my 22 footer with and without the WDH. Under normal conditions, I felt no difference. My truck has a 2900# payload with no drop in the rear with the trailer hooked up.
So, on the way home from a 3500 mile trip, we encountered really bad storms with really high crosswinds. I am glad I had hooked up the WDH to help with the sway. I was watching 18 wheelers being blown around from lane to lane and swaying. The WDH helped my trailer stay straight, and except for a couple of tense moments we made it through the storms safely.
So my experience says use that WDH. You just never know. Happy camping.