As you have not purchased the camper or the truck yet you may want to consider a lighter camper. I knew I did not want a DRW truck for many reasons - width or truck, turning radius, length of truck, no double cab unless a long bed.
I decided that the maximum loaded weight was 4500 lbs. with SRW and that meant a 3500 lb. dry weight for the camper. Every pound lighter the camper the more of a safety margin and the more potential for carrying gear or a generator and fuel. There is also the need to consider the tongue weight of a trailer should you later want to tow one behind the truck.
I found that the Lance factory weight as shown on the camper was 300 lbs. more than indicated in the brochure and the actual weight at a CAT scale was 300 lbs. more. That was before putting fresh water in the tank at 8 lb a gallon.
There are many excellent campers for short bed and long bed trucks, even with a slide-out, that weigh under 3400 lbs. dry weight and can be hauled around in a SRW truck. If I was going for one of the very large dry bath campers that required a DRW truck I would go with a Class C motorhome instead and have a better integrated RV and a much less expensive one.
With the MH you only need to fuel up and load up. With the slide-in camper and pickup truck you become the system integrator and deal with load data and what to do to modify your truck (tie-downs, electrical harness, fuse and isolator, bed liner, shocks, anti-sway bar, tires). For a smaller and more nimble RV I went with a SRW shortbed 4WD truck and with a smaller and lighter camper. But I travel 100% in the west and on forest service roads and not on the interstates going from one RV park to the next so it all depends on the individuals and their spouses.