hi seanie,
the option i went for which you havent listed was to make/buy a waterproof cover. extends life of the wooden trimmings, stops boat from swamping during periods of inactivity and most little monsters playing nearby will go for an uncovered boat

. can be made with little cost or shop around for one prices can vary considerably.
edit: i just read this thread
http://www.flyforums.co.uk/boat-fish...p-fitting.html
and realise it may help you decide. i think i may have been thinking along the wrong lines.
tight lines