I'd be interested in something like this. I just got a camper that's about 2.5k lbs and I noticed the rear sagging much more (over 2").
You know a shop I chandler, az area thatdeals with suspension upgrades?
Think I'm in the same exact situation. I just got a popup with a 300# tongue weight and the camper is about 3.5k full. When I put it on my 98 4runner, the rear dropped about 2.5". Do air bags really work? Was thinking about having dealer install them but they seem to rape everyone on these...