I drove 3500 DRW trucks for years hauling heavy slide-in campers on 2-wheel drive trucks. I ran Bilstein shocks on the front and adjustable Ranchos on the rear. Adjustable Ranchos are difficult to adjust on the front and they won't last over about 30k miles because of the heavy diesel engine on the front. The adjustable Ranchos are lifetime warranted and be sure to save your receipts in order for free replacement. To control sway in addition to the anti-sway bar, upper Torklift StableLoads work very well.
Bill