Motorhome Magazine publishes a list of towable vehicles every year. See Motorhome Mag
and look for the Dinghy Towing Guide on the front page.
FMCA Magazine also publishes a list but it is not in the public section of their web site.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL