Bird, with my truck camper mounted and the bumper pull trailer hooked up the use of both air bags and the weight distributing hitch works well.
It means I can always keep the rear of the truck at the same height so it steers the same and also helps for carrying the load.
I actually measure the height of the rear fender wells unloaded so I have a reference point to go to.
My trailer requires a weight distributing hitch and the air bags just help out.