It all about tongue weight. I had a van (G3500) and a regular trailer, but long. The trailer outweigh the van by a good 1500#. Now it easy with a gooses-neck, put the load to the truck, all done.
The van only weighs 5500#. Sure i could have increased the tough weight and that would have worked great. I do that all the time for shoat trips.
but you have to figure is where is a TW going. It is NOT at the rear axle, (gosseneck) it is behind it, by a good 36".
I drove a lot of highway and the factor is, do I want it to 'handle' the weight ? or do i want it, to work well, with the weight.
With the WD hitch the van AND the trailer ACT as one.
Ya it that a little time to install it. But it only takes an extra minute or two, but if that important to you... well
Have to run a WD hitch all the time, it become very quick to hoke up.
But it will cost you a bit up front.
Shawn there is the thing call a 'rain coat'