Our trailer is under 8k lbs, with 1200-1300 lbs of tongue weight and we pull with a 2500 Suburban. We use a Reese Dual Cam system and it works great and I've used it on 2 trailers now. How it mounts to the trailer frame is less than ideal and one side came loose on my first big trip with it on this trailer. I ended up removing it and drove from Boston to Michigan with just one side working. I could tell the difference with only 1/2 of it working (other side was just hanging by the chain rather than riding on the cam). It was mostly noticeable in Boston on the express way with multiple lanes of cars and semi's. When you have semi's on both sides of you and nobody is going the same speed, I felt some movement.
This year we went out west and with 20-30 mph cross winds, we seemed to be just as stable as the semi's on the road with us. Moving around with the big gusts, but still able to travel normal speeds. All other conditions, it is rock solid. If I were you, I'd probably give it a try without a sway bar and then add 1-2 friction bars as you feel you need to since you don't want weight distribution.
I do notice that 2 lane roads rarely give issues, it is the interstates with passing vehicles that will challenge any set-up. Plus windy conditions at the faster speeds. If you try without sway control first, make sure it is a super long trip and make sure you try to experience as many road conditions as possible.
Good luck.
