I am sorry but may I make one more sugestion you want a stunning location which can accomatate 100+ people, there is some of you who dont want to be stuck in one place all the time, and finally you want it to have some relation to steam.
well may I also present you with
WAVERLEY - the last seagoing Paddle Steamer in the World & the Historic Ship BALMORAL! http://www.waverleyexcursions.co.uk/privatecharter.htm
Waverley’s comfortable lounges, bars and restaurant will be open for your enjoyment. She can accommodate 110 guests for a first class sit-down dinner or up to 300 guests for an informal style buffet.
we could seek acomatation in any port and then take to convention to sea and come back to same port or another one further down the coast.
I know this is a very far fetched idea and you really didnt want any more far fetched ideas, I thought if this was even remotely do-able it certainly would make it a stunning event. one that could out shine things like Whitby!
An interesting idea but you need to decide if you are going for its winter base (somewhere doon sooth, dinna ken where) or summer base (Glasgow). If you want to go for Glasgow, I can help as the Glasgow marketing Bureau is all set up to do all the venue and hotel type research for any group wanting to bring a conference or convention here and also I am city councillor for the city centre. There is an active Steampunk society here. If anyone decides on Glasgow, just let me know and I can meet with the convention people here to start the research balll rolling.