Similar experience. I keep my 10' portabote strapped to the outside
of the life lines on home made brackets similar to windsurfer
brackets. I assemble it athwartships on the coach roof and drop it
into the water with the main halyard. To disassemble, I remove the
seats in the water, hoist it aboard with the main halyard and a
lifting bridle, pull the transom, fold and replace in the brackets.
1/2 hour in and 1/2 hour out. Majority of time is spent retrieving
and stowing the various parts. Boat has a dry ride and is
indestructible. fast as a scalded cat with a 5 horse. Planes two up.