I previously towed a 16ft single axle TT with a VW Touareg and used a sway bar regularly, and I'm pretty convinced it saved my bacon once in Glenwood Canyon when a big wind gust hit. That said, I decided at first to not run one on our 21BHS with the warnings about the aluminum frame. My TV now is a Ram 1500, and this camper pulls so much better with the double axles and balance of the trailer that I see no reason to use a sway bar. We've towed it all over the Colorado mountains, and out to Wisconsin and back this summer in all sorts of quartering and cross winds with no problem what so ever.