Launch vs Tow
For a tow vehicle, you want a 2wd, long wheelbase, manual transmission, dually is nice too. BUT for a moving/ launching vehicle, you want an automatic 4wd short wheelbase. Both need to be up to carrying the weight, but the big problem is that the ideal vehicle at the begining and end of the tow is terrible for the drive. Most people feel the most dangerous/important part of the whole thing is maneuvering the boat around in the lot or ramp, so obviously a compromise is best. No semi's or bronco II's. BTW having "low range" is a HUGE asset for any low speed maneuvering, esp reversing and ramps/grades, and that is a feature you only get with 4wd.