schlep1967 wrote:
After looking at your set-up my first suggestion is out. And disconnecting your weight distribution will only make it worse.
I think you are stuck with boards under your rear tires or .... Get some airbags installed on the vehicle, preferably with an onboard pump, so you can inflate them before backing into the driveway. You may even need to wait to inflate until you already have the back end of the trailer up the driveway.
It already has air leveling (most likely) and is also likely 19 year old components that aren't real cheap. I wouldn't recommend stacking bags on tht vehicle just to see how far you could stretch the OE air shocks.