I had Air-Lift Super Springs bags on my old truck, son still has it. I also went to load range H 19.5" tires. With the air bags you need to plumb them separately so they aren't equalizing all the time. Plumbed apart when the camper leans the extra weight is met with resistance from the bags pressure instead of the air lines transferring pressure to the other side.
When I went to Alaska I was tipping the scales at 11,500 lbs on a 97 K2500 with 200,000 mi on the ticker. No leaning, wobbling, sagging or problems of any sort.
