Yes, I'd go to the show again and have an informal GAS-Attack party!
The only meets arranged since I joined the site have been for the Fusty & Crusty mob, and the London walk (if I recall correctly), although there have, I think, been a few informal meetings of a couple or three members.
I think the organisation task does fall to a member to coordinate, with no liability for weather or any of the other stuff that can go wrong!
1. Decide on a location, eg Ironbridge Gorge, a heritage railway, a studio, etc
2. decide if any tutorial/guidance is going to be on offer either from a member or something more commercial
3. Decide on some candidate dates
4. Invite takers
5. Arrange/keep tabs on dropouts and late joiners
6. Arrange the meeting point and refreshments venue during the day.