I towed without and with the Hensley hitch and i will never tow without it again. You will get a lot of replies telling you to set up you WDH properly and get a bigger truck. I did all that and at best it minimizes sway. The Hensley hitch completely eliminates any sway and you will never have any "white knuckle" towing again. I am an engineer so I understand the force harmonics of sway. With a single pivot hitch there will always be some sway. Some drivers know how to drive these well, but if they make 2 to 3 wrong moves... They will flip. I can flip anyone single pivot high center of gravity trailers (all travel trailers...) with just 3 very poorly timed turns. With the Hensley you can't flip it if you tried. Because it is a revolutionary 2 pivot point hitch that 100% eliminates all sway. Yes, it is expensive (>$2000), but it was the best $2000 I ever spent. And they give you a 60 day unconditional full refund if you don't like it. No one has ever returned one. It is harder to hook up at first. but once you know how to do it, it is actually easier.
Go to their web page and watch video of the 4 door sedan pulling a huge Airstream going off onto soft shoulder and back on rod over and over with no sway. They even take it through a slalom course. No, I don't work for Hensley. But as an engineer, I recognize a revolutionary new design that works. Dual pivot point is the key! Dampens all harmonics.
Trailer sway causing flips is the number one cause of towing accidents. Some insurance companies actually give you a discount if you have a Hensley hitch.
When you get the "buy a bigger truck or distribute your weight" responses..($50K to $75K) Show them this newsletter I got from Hensley:
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The Big Truck Myth
This is the oldest argument we get when telling folks about the Hensley Arrow or Cub:
"You just need a big enough truck!"
Besides the fact that a "big enough" truck now costs more than most starter homes, the statement is simply untrue. Sure, a big truck with a big engine and heavy-duty transmission will allow you to pull more weight, but there is absolutely no way it can control trailer sway.
Here's why.
The point at which the trailer is connected to the truck does not change, regardless of vehicle size. It's a coupler mounted onto a spherical ball. The design is intentional to allow the trailer full freedom of motion. No matter what angle the tow-vehicle\trailer combo is on, the trailer remains attached.
And aren't we glad? If we put a stiff rod between the tow-vehicle and trailer, turning would be a bit difficult.
The downside of that set-up is that the trailer is free to move as much as the tow-vehicle. If the trailer gets hit with a strong wind or the turbulence of a passing truck, it has to pivot on the ball. It must sway.
Do I need to repeat that? The trailer must sway. It has no choice.
Now to my point. The only variable in your rig that matters is the connection point between the tow-vehicle and trailer. If it's a round ball, the trailer will sway. If it's a round-ball with one of the many friction sway-control hitches on the market, it will sway a little less, but it will still sway.
So adding more weight to the front side of that connection accomplishes nothing. Maybe the driver will be blissfully ignorant of the swaying trailer behind him, but that trailer is still swaying. It has to. Physics is physics.
Saying that a big truck will prevent trailer sway is like saying that a bigger tree will keep my tire swing from swinging in the breeze.
That being said, folks, you still want the horsepower and transmission to pull a big trailer. Our friends in our controversial video like to experiment with extremes in order to prove that the Hensley does what it claims. If we'd used 3/4 ton trucks in that video, the credit would have gone to the trucks (because they didn't read this article). What you need to understand, though, is that the truck is for pulling, not sway-control. You'll notice that every trailer accident involves a truck or SUV. They had a "big enough" truck. Now it's a scrapped truck and trailer.
Hensley's goal is to make sure you enjoy your trailer and spend time with your family, not sitting on a freeway shoulder waiting for emergency vehicles.
Give us a call to find out how we can make this summer stress-free.
By the way, "proper trailer loading" is another favorite argument. I responded that one on our website here: Proper Trailer Loading.
Hensley Mfg., Inc. - Trailer Sway Eliminated...Guaranteed
Have had my Hensley for more than 15 years. DW got it for me as birthday present and we used it on our "Bigfoot". It was amazing! I recall sailing by Semi's laying on their side crossing the Mojave in severe crosswinds. Had a 5th for a few years then back to a TT's. First one was V-Nose and the Hensley still worked great. However, the V-Nose did require different frame brackets. Now towing a 2017 FR WFLT23FBDS. It not being a "Pup" it is definitely a bit of overkill but it works just fine. I have never regretted the purchase. Sway? What sway! 
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