I have a 2014 Ram 3500 SRW and recently backed under 2 different fifths at the dealer because I was concerned with your issue as well. The first was a Jayco Eagle HT series...only about 8k dry, 10k GVWR. The floorplan is what we wanted in a rig....the truck maybe squatted an inch. I then backed under a Grand Designs 40 ft that had a dry weight of 12300 I think it was...truck settled about 2 inches and had at least 7 inches bedrail clearance and was about perfectly level. Obviously the much bigger, heavier unit with 16 inch tires seemed to setup a lot better. I think I will need to go with a heavier pin weight rig, because the lighter ones dont settle the truck much at all.
