I'm surprise no one has mentioned the only known solution.
The OP had the same sentiments I had when I hitched my 1/2 Ton Yukon XL Denali during our first season to a 35 foot travel trailer by way of a Blue Ox Sway Pro. It did ok for the first couple of local trips. But...no so much when any significant wind was present. Towing through a wind storm with uncontrollable sway one July afternoon will forever stay in my memory. A normally 3 hour ride home took 5 hours as I couldn't drive faster than 40 mph. After this hair raising white knuckle experience with 35 MPH crosswinds, I knew it would be the last time I would drive with a Blue Ox.
So, it was either upgrade to a new $50K HD truck or find a different sway solution.
I choose the cheaper route...a Hensley Arrow.
The Hensley solved it completely and provides a completely relaxed towing experience. Lateral trailer sway is now non-existence in ALL driving conditions.
For kicks and giggles, I reverted back to the Blue Ox for 1 trip when I upgraded TVs to a 3/4 ton RAM megacab. I only upgraded TVs as I ran out of payload with my Yukon. Instantly, the 'sway control' hitch brought back white knuckle memories. I was dumbfounded as I assumed the 160 inch wheelbase of my new 3/4 ton truck would inherently curtail trailer sway. My former Yukon XL was limited to 130 inches from axle to axle. The tail was wagging again when passing trucks of any substantial size. The Blue Ox attempted to control it but you could still feel it in the steering wheel.
With the HA, that feeling never exists. Lateral forces on the sides of the trailer are carried over the entire rig, keeping the trailer in perfect alighnment with the TV. There is never a sway condition.
Since using the Hensley on two long distant trips from Michigan to Florida, the ride is extremely relaxed cresting a mountain, passing 100 ft semi's, and movin through 40 mph crosswinds. My DW (who has never towed before) has been in the driver's seat for about half those miles. We almost forget we're towing a 35 foot travel trailer.
Again, you really have to pull with a Hensley in order to understand how well it works.
Good luck.
