I'm running an Equal-i-zer WDH which has built in sway control. About $460 (delivered) from RVWholesalers.
I don't recall how much front suspension loading I have, but it's important to have some, otherwise no weight is coming off the rear axle. Trailer tows pretty level, as it should. There's a lot of slop in the Expedition receiver so it took a more severe setting than I originally thought.
The purpose of the WDH is not to level the tow vehicle but to transfer weight. Guys with real stiff rear suspensions who skip a WDH often wonder why their steering is so light.
-- Chuck