The time honored way to upgrade your suspension is by degrees, as every rig has a little different makeup of springs/coil spring rate/helper springs/air bags/tires/wheels/shocks/double shocks/anti sway bars/loaded camper weight/center of gravity.
Everything in this regard is a tradeoff. You can get rid of sway but if you go too far with air bags @ 90 pounds; a thick anti sway bar; and E rated tires at full inflation you may not like the loaded ride.
If changing things, by degrees, you can measure how much and if the change is going in the right direction.
Do go for the easy solutions first.
I’ve found that with the load on, keeping all tires @ the rated maximum cold inflation will save you gas and have the bonus of less squirm and sway on the highway. That’s loaded.
If on dirt, or washboard, or gravel for a couple days, take the pressure down (read Mike’s insightful table of deflation) and buy a high use time, 12v clamp on compressor.
2020 Ford F-350 XLT FX4 4WD SRW SB SC 7.3L Godzilla Gas TorqShift 10R140 397 amps dual Alt dual batts Frnt Dana 60; Rr Dana M275 E-locker 4.30's 4580/4320/4066# payload 7243# curb wt. 11,300# GVWR 5-er prepped. 2020 Northstar Laredo SC, 12v compressor fridge, cassette, 320w Solar sub zero insulation.