We own a 2014 Ram 2500 with the larger Hemi, long bed, regular cab. Our TC weighs somewhere in the range of 3200-3400 lbs completely loaded. The cargo capacity of our Ram is at 3900lbs, so we are not overloading the truck.
We have the coil springs (I think) and have used this combo now for around 10,000 miles, to include the Rockies. I have had zero issues with the suspension system.
As long as you do not go over the cargo capacity (we have a sticker inside the door that tells us what it is), then all is OK.
Del