I wouldn't assume an air suspension or IS on a trailer will cure those ills. Air ride sounds like smooth travels but how is that quantified? What proves that ride quality is improved? Rear kitchen fivers are notorious for such chaos being at the end of the "whip". Rear living rooms don't generally have such issues as things are more fixed in place than things sitting loose. I would research this one carefully.
2016 3160, Legacy, Manufacturing defects corrected by me, 2014 Ram 3500 SRW SWB 4X4 6.7 Aisin Mega Cab, EBC slotted disks and brakes, Titan fuel tank.