I agree with you that there are still a number of classic designs around the Cape, but I suspect there are precious few traditional boats, either in build or design. There weren't many carvel boats around even a dozen years ago. Maybe that's why the membership faded. Have you thought of creating a Classic BA?
My reply to Annie is below:
There is also a Dogger (plywood) on the HBYC marina, the guy spent a year restoring it, then got sick, its his leg and he is a diver, his marina rental fell behind and a week back he gifted the boat to the marina section to fund arrears, so thats a steal for someone?
Do you have a picture of your own Dogger, I need photos to expand the book done by Colin with TBA members boats.