You don't indicate the actual grade of Ram that you have. Based on what I do see, I'm guessing it's a half ton. In any case, I'd start with the "payload capacity" and "axle ratings" on the door jamb sticker. 2600 lbs as a dry weight is probably well beyond any half ton's capability. Yes you can add an infinite amount of suspension upgrades to carry the weight but all the rest of the driveline components such as axles, brakes, wheels, wheel bearings, driveshaft and frame might be stressed beyond design limits. Granted there are two schools of thought here .. many people ignore GVWR ratings and claim success in carrying more weight than the manufacturer's recommendations. Personally, I believe in having a roughly 20% safety margin for emergency situations. To each his own obviously but I'd recommend this as a starting point to help point you in a camper that will work for your application. My only other piece of advice is not to take any published dry weights as fact but find a way to do a Cat scale verification just for peace of mind.