Go with the Kelderman as mentioned up at the top and you can get rid of your springs completely.
Kind of makes me wish I had a 4x4, here's the rear

And here's the front

 

Thanks Steve for the pictures I am looking into the kelderman. I plan to keep this truck for many miles so I will invest some to make it the way I like it.

 

They say the setup above will make your truck ride like a Cadillac. I don't know what kind of pricing there is on it, probably not cheap.

 

When I don't have the Lance Camper on the back, I've tried removing the sway bar. It helped marginally, mostly less side to side jostling. The biggest difference was replacing the sturdy stock gas shocks with Rancho 9000X, I think 6 way adjustables. With the camper and sway bar on I run 'em at the stiffest setting. They're just great. Went on a 9000 miles trip to Alaska that way last June. With out a load or sway bar, I run 'em at the weakest setting. This has helped a lot not banging up against the always loaded gas part of the stock shocks. The unloaded suspension rides in the non-overload zone with the springs. It's not a very wide band. I do use a fiberglass bed cover that weighs about 150 lbs. That also helps the unloaded ride.
regards, as always, jefe