I have Air Lift 5,000# air bags on the rear of my 24' Class C. I added them to deal with the extra tongue weight of my single axle cargo trailer . When loaded to 2,600# {which is about as heavy as I ever load it} the tongue weight drops the rear of the coach 1.5" {undoubtedly lightening up the front end... and not in a good way}".
Inflating the bags to 50 psi {they are rated for 100 max} brings the coach back up restoring the 1.5" drop and leaving the tongue of the trailer dead level at the manufacturers recommended ball height of 16". An unexpected side benefit of this system is that when not towing I keep 25 psi in the bags to keep them deployed as per the recommendation of Air Lift and my ride and handling, while always good, got noticeably better.
The heavy duty Bilstein shocks seem to work very well with the bags and while I never tried to add more than 50 psi I doubt this would raise the coach much if any.
:C