Having a hard time envisioning this...any chance for a photo? Sounds like a good idea. I fashioned a built in one wheel device, but it's very awkward on anything but a smooth surface.
Actually I find some power boat folks looking longingly at my pontoon...small, no trailer bs, cheap..and best of all: only room for one. BTW: I towed in a motor boat last week with my MinnKota and arm power.
Cheers,
Bernie