First, not sure what truck you are using with your camper. That would make a difference in what you finally decide. The room around the spring package on our truck was just too tight to make adjustments. We blew 3 sets of Airlift airbags with our 2016 Chevy Colorado Diesel and decided we had to do something different. After reading Buckland's posts, we talked extensively with Boise Spring and decided to order one of their leaf kits and have it installed locally. The price was very fair, about half of the competitors that we called, and delivery time was very good. They were great to work with. Price for yours would depend on your truck. Our mechanic in Tucson removed one leaf and installed the Boise springs and that did the trick. We were prepared to change out bumpstops for a Canadian product, or replace our stock shocks with Bilstein shocks, but after a 16,000 mile trip across Canada, including some rough roads and terrible potholes, we concluded we didn't need anything else. When the time comes to replace our shocks we will likely go with a better shock, e.g. Bilsteins. Note, we leave our Fleet 4Wheel camper on full time, so ride is not an issue. We stopped in at Boise Spring on our way back to Tucson and all was well tho the springs on one side had shifted slightly. They installed additional clamps to provide more stability at no charge. Good luck!
Chris