Looking at a travel trailer 20 ft long dry weight 2400 lbs do I need a weight distribution system according to the sale person I would not need one but a sway bar hook up.
As long as you load it properly to keep the tongue weight up, you shouldn't need WD or sway control with that combo. If the trailer is loaded tail heavy to keep tongue weight down, sway control won't help. Air all tires to sidewall max while towing. Just my humble opinion.