Actually, with the use of surge brakes on these trailers alot of the manufacturers will not recommend WD hitches.
I know the surge brakes that DHM use, UFP, allows the use of WD hitches.
Check with the surge manufacture and/or trailer manufacturer.
But, in all reality our boats are light in comparison to travel trailers so, there really isn't much need.
Chris
Get the Grip you Deserve
www.wakejunky.com