This thought had also crossed my mind (about a ferry meet). I was going to try to organise one for next year (when we should have something to show for our labours over the last 4 months or so).
I am also in the process of designing a 'port' with breakwaters, vehicle assembly areas, buildings and, most importantly, linkspans!! It is planned that this can be transported in sections, bought and build by individuals, and be completely modular - meaning that whoever turns up with their section can know that it will interlock with an adjoining section thereby increasing the port area for operations. All built to 1:96 - but close enough to 1:100 to be useable.
A meet is a damn good idea!!!!
Carl