Many years ago, a family friend towed their Airstream with a Dodge station wagon using a Reese dual cam hitch. You could feel it snap back to center after a turn.
All sway control hitches only offer limited resistance to sway caused by minor pushes from wind or road conditions. Sway caused by improper load is way more force than sway control hitches offer.
I've never seen a test of the Pro-pride type hitch using a tongue light trailer. It would be interesting to see the results. A properly loaded trailer tows well without sway control so we may never know how effective they are.
