Not sure exactly how your spring set-up is, but I added a couple of user mods which along with added Helwing and Ranchos made for an almost ideal ride and height.
I made perch extenders for the top factory helper springs from 2" TS to engage sooner. I installed timber felling wedges to allow the stock bottom overloads to engage sooner. All this made the springs do the intended work before needing to put a lot of weight in to engage the them.
I do not have the camper anymore, but have used it recently to haul several loads of gravel for home construction projects... one load was just over 2 tons... about the same weight as my maxed out fully loaded camper setup.
Cheap modifications.