Im gonna buy a 20 foot enclosed cargo trailer and im curious as to what hitch im gonna need. I don't need a weight distribution hitch because i have airbags but im wondering how apt to sway this kind of trailer is. I can get a sway adapter to put around the ball mount but i don't know if i even need to be worried about sway. Ill have it darn near the GTW which is 7000lbs. Has anyone had a sway problem while pulling one of these with an OBS F350?