I am a fan of StableLoads, I have run them on the past 3 trucks, they are inexpensive and you can put them on your truck in your dirveway, no jacked up or even take the wheels off (albeit easier if you take off the wheels).
The other item I run is an increased diameter sway bar. Hellwig Big Wig, add to those 2, a set of adjustable shocks, I run Rancho RS 9000 XL. This is how I outfit my trucks and have been doing so for 20 years.
I have run airbags and would not hesitate to run them again in the right application. They offer a better ride with a 5th in that they absorb sudden and harsh inputs that get transferred from the tabernacle to the 5th. That said my prime concern is performance and safety first. I am still considering adding an air bag to my truck to give the 5th a better ride, not the truck.
US Army Infantry, my rucksack was my RV
'16 Jayco Eagle HT 26.5 RKDS
'15 F 350 CC, LB Dually King Ranch