I have towed my 2720SL with a 2002 super crew cab for thousands of miles with no WDH or sway bar. Never felt unsafe or unstable. My new 2019 Traverse actually senses sway and apples the trailer brakes to counteract the swaying motion. Some new vehicles offer this function with a towing package.
We have towed our 05 2619 with a 02 F 150 Supercrew short bed for thousands of miles and never had a problem , we do not use a sway bar or WDH . Hope this helps.
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Jimmy & Rose
'05 2619
'02 Ford Supercrew
Texas