iceratt,

As far as bike trailer hitches go.... chunk-o-car tire is #1.... even over any *professional* hitches made by the great folks at Burley. Duct tape is also a good one or two use only hitch, but use bolts and/or speaker wire to attach it to the trailer. Don't worry, 4 layers of looped duct tape will tow a small car.

I'd try to attach wheels to a set 2x4s and strap them under the boat. Me and a friend moved using these once, including a 9 ft sofa over 2 miles, with his drunken girlfriend riding along in comfort.