Do sway bars really help that much? I have a ford f-150 supercrew 4x4 with the towing package and tow a 25 travel trailer. It doesn't seem to sway at all when I come accross semi or log trucks. Some people say that it is necessary with the f-150 but I don't really see what it is going to improve. Any information would be helpful. I have only towed the trailer home from the dealer so I haven't really got to use it yet. I do have a torsion bar setup with this combination.