Slide-in's need stiff shocks
Here's something to think about. My slide-in weighs around 3100 lbs wet/not loaded. I use my camper about 3 times a year, or about 1 month a year. On the '99 I've had air bags on and using the stock shocks. After 2 years the ride really deteriorated when empty, really got bouncy. So I got Rancho 9000 shocks and noticed when I took off the factory shocks they were all ok. Upon installing the new shocks and setting them on 1 or 2 in the rear I still had a lousy/bouncy ride. even removed the air bags but ride remained the same. So I thought about it some more and realized maybe my leaf springs were losing their arc due to the heavy load of the camper over the last 3 years. I moved the shock setting over to 4 on the rear and no more bounce. This seemed to help eliminate the backlash and keep the rear end down. So the moral of the story is if your going to carry a slide-in. get good stiff(adjustable) shocks to keep the springs in good shape from the get go. Air bags are a good for leveling up the rear, proportioning the weight, proper steering and turns. Enjoy your camper!