I do have a WDH. It does help to level the truck and transfer the weight back on the front "axle". I use the WDH to put the truck back to normal ride height then add 15 psi to the air springs to minimize the bounce.
The tires on it now are E rated and are rated for a maximum of 80 psi. Today I ran 60 psi in the rear ones. Will another 20 psi significantly stiffen the side wall?
I see people towing bigger campers than mine with 1500s.