I don't use a WDH, as I don't think my rig would be made any safer with one, although I will try one at some point in time (if I can find a suitable one to borrow from someone), just to see if it would reduce stress or not.
For others using a weight carrying hitch (a NON-WDH), you might want to verify your hitch, drawbar, and ball are beefy enough for the tongue weight. I've seen some pretty weak 2 inch balls, and had to look for one with what I thought was adequate reserve capability (I use a ball and drawbar that are rated for 750 pounds tongue weight, into a receiver that is rated for at least that - forgot the exact spec). With two heavy batteries and propane up front, I figured it's not worth taking a chance (I haven't yet had a chance to weigh the tongue). Personally I'd be very cautious of even stuff rated 500 pounds with a TM, from reported tongue weights I've seen.
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