We (Bonnie and I) have a 17 footer. It was purchased used with a friction type anti-sway bar. I tow with her Audi Q5 2.0 liter. I purchased a weight
distributing hitch. I personally recommend both due to our combination of trailer and tow vehicle.
I like the ability to not have tongue weight
pushing down behind the rear axle
take weight off the steering wheels. The WDH allows that.
We had a deer dart out from the brush on an interstate and run into the side of the truck. I swerved when I realized something large was coming, but the deer still hit the side. I don't think the recovery from my swerve would have been as controlled without an anti-sway device.
Your situation is a bit different. Your tow vehicle is more suited with a longer wheelbase and a perimeter frame. You might not realize a similar benefit from a WDH that we do. I'd still suggest that you seriously consider an anti sway device.
p.s.: No sign of the deer was found when we stopped less than 1/4 mile after to assess any damage. Nothing in the road, no marks on the truck. Mass hallucination for the both of us?