Here is another option.
The RoadMaster Anti-Sway Bar really worked great at reducing the sway over bumps, short turns over driveways, and in the wind. This is our second trip with it. We had a good test for about 300 miles on Interstate 84 between Portland and Boise. The Columbia Gorge and the desert are usually very windy. No problem this trip compared to previous trips with steering control with the winds.
We went with RoadMaster based on a recommendation from a mechanic at Camping World. The sway bar needs to be ordered specifically to match the chassis.
General information from RoadMaster.
Roadmaster Inc. - Tow Bars, Braking Systems & RV Accessories