I pull a 2011 Blue Ridge 40' 5er with a dry hitch weight of 1,930 lbs, an unloaded vehicle weight of 13,159, and GVWR of 16,080. My tow vehicle is a 2008 Ford F-250 4x4 with the 6.4 powerstroke. I had a set of Firestone Ride-Rite air bags installed with in-cab controls. I've pulled it on several long trips and never had any trouble at all with sway. As long as I keep 50 to 70 psi in the air bags, it drives great. I try to hold the speed to 65, but sometimes have let it get as high as 75 going downhill and still didn't feel unstable. I keep a good set of Michelin load range E tires on my truck and keep them inflated to 80 psi. I don't think you would have a problem pulling with your SRW IF you have airbags. My truck didn't steer well at all pulling this beast before I added the bags.
Mike in Tennessee
Former 2 time FR owner
2007 Crossroads Cruiser 30QB Fifth Wheel
2008 F-250 Lariat 4x4 6.4 Powerstroke
Firestone Ride-Rites w/cab control