Per DSK:
Considering that the technology exists to make a dinghy you
could pick up in one hand, why fart around with wheels &
lifting brackets & tackles and all the rest?

Walking a half mile carrying something 10 feet long that weighs, say, 30 pounds
gets old after a few trips - especially when there's a wind blowing. It's also
really nice to be able to stack other stuff on the dollied boat.
--
PeteCresswell