jp,
It is difficult to find any small lifts for a Dodge. My circumstances required beefing up the rear suspension with about a 3" net loaded lift, and adding 3" lift pucks to the front coils. My Lance camper weighs 2650 pounds, wet and loaded. You want as little altitude as you can get away with when hauling a hard side truck camper.
But, there's more to it than that. To the camper package rear axle I added 2 more upper secondaries per side for a total of 3. Also, I added a 3" lift spring to the main pack, and of course, new longer U-bolts.
To make the upper secondaries come into play sooner I added Stable Loads, those black composite blocks in the pic below: Notice they are not engaged because the truck bed is empty. So, I have about an inch of travel before the secondaries are engaged.
I would say the rear has about a 5" lift, unloaded. But it's rarely unloaded. These are 35 inch tires on steel wheels.
Good luck in your quest. Report back here with your findings. There must be a better, and I"m sure not cheaper way to lift your truck than the route I took.
jefe