Air Bag Recommendation needed

We've been full-timing for a little over 2 years now with a 2014 F350 6.7L 4x4 long bed and been happy with the towing/poser/etc. The weighed pin weight of my 43' TH is 4250 lbs - well within the capacity of the truck. However, it does squat about 2 inches measured at the wheel well under load which caused the trailer to be slightly nose down. This isn't a huge issue, but my front landing gears will occasionally drag coming out of a gas station or some parking lots.

What recommendations do you have on brand/type for rear bags - or some other levelling device that would not stiffen the ride? This, other than our motorcycle, is our everyday driver, so I don't want to do anything to further harshen our unloaded ride.