Motor Home Magazine publishes an annual list that is downloadable. I believe that the cost is $1.99 per year. Make sure that you are specific on the make/model/year/options of the vehicle that you wish to tow. For instance, the 2012 Ford F-150 4x4 automatic is not towable with all wheels down - however, in 2013 Ford added a feature that allows the truck's differential to be shifted to neutral (not to be confused with the neutral for the transmission) by turning the 2H/4H/4L switch from 2H to 4L five times within 7 seconds. Works like a charm! Good luck, and don't forget to get a braking system for your dinghy - it's the law in nearly every state, plus it just makes good sense. Hope this helps.
