I had airbags on out 2001 F-350 hauling a 4k lb camper and I liked them. I generally ran about 90 psig as I recall.
On your rig, you need to test it at different airbag pressures to see what works best. Start out at a high pressure, drive it around some, let 10 psig out and test again. You may find that you cannot run them at zero pressure with the camper in the bed because the upper and lower airbag bracket may come into contact with each other.
Did the dealer install the airbags with seperate air fittings?
Ultimately any srw truck is going to rock around some with a large high CG load in the bed. You do what you can to reduce it to a minimum, but there will always be some.
Good Luck,
Brad