First off welcome to the forum.
I tow a Jeep Grand Cherokee with our Super C. We have no problem pulling or stopping it. Sure it slows you down when you take off but after the diesel spools up it takes off at a pretty good clip. We have pulled passes with it and I'm passing all the semis except the empty ones and going up most of the passes in 4th gear running right at 50 to 55 MPH.
I would think my Grand would probably weigh a little less than your 1500 but not by that much. Mine is rated at 10,000# towing but the manufacturer just changed out the hitch and the new ones are rated at 20,000#. They did not change anything on the chassis. I could get the new hitch and bolt it onto mine and have 20,000# also but I haveno intention of ever and I mean ever towing that much weight. The heaviest I'll be towing is the Jeep.
I don't know which Super you are looking at but there are different sizes. Mine is built on an International truck chassis with air brakes and a 25,999 GVWR. It has the Allison 3000 trans with a Cummins engine and 22,5 tires.
I also have a flat bed trailer that I could tow behind but I don't want the hassle of trying to find some place to stow it in the campground.I'm 37' long without the toad and there are some places that I haven't been able to go to so having a trailer would just compound the problem.
Good Luck on whatever you decide to do.