>400 pounds of trailer requires strange elaborate sway bars and brake systems and strange dampeners on the hitch. You don't need any sway control whatsoever so

>400 pounds of trailer requires strange elaborate sway bars and brake systems and strange dampeners on the hitch. You don't need any sway control whatsoever so long as the weight distribution is sane for the speed you want to travel. Look at large boat trailers for examples. They never have sway control unless the owner adds it because they want to load the boat farther back (because their vehicle can't handle the tongue weight). Vehicles not being able to handle the tongue weight of a properly loaded trailer is becoming less of an issue for light loads because asinine CAFE rules force OEMs to push the axles to the very edges of the vehicle increasing wheelbase and reducing rear overhang so your average car or small/midsize SUV today can handle tongue weight a lot better than 15yr ago. >In theory a perfect aerodynamic and weight balance tow and trailer would never fishtail at any speed; in practice of course they do. Only because people are idiots and procrastinate putting the heavy things in the uhaul until the end and then they want to drive 80mph with it. It's not a matter of theory vs reality. There are very few situations where you can't get good weight distribution if you have ten brain cells and ten seconds to plan how you're gonna load stuff.