I'm sorry it has taken me so long to reply.
Firstly, the Romantics exhibition was great. It definitely had lots of paintings of interest to cloudspotters. You should try to make it along some time if you get a chance.
Regarding a general society get-together, it is a nice idea. My only reluctance is that it sounds like a lot of work to organise. Also, when I have thought about it in the past, it always felt wrong to do a gathering in just one place with such an international society. I did once consider trying to find a big IT sponsor to enable some sort of virtual gathering. The idea was that people would get together in groups around the world and could all be linked up via webcams etc. I liked the fact that there would be no one place that everyone was meeting (rather cloud-like), minimal flights/travel and a variety of clouds across the different locations. It would be a big deal to get it all to work technologically, and I never got very far working out who the right sponsor might be.
I think that a more local gathering could still be a good idea. As you might know, there was one in County Cork in Ireland this summer past, which was fun – even though the clouds weren't behaving (this is inevitable, of course, for a cloud festival). They are planning another, up in Sligo, next summer.
If other people think that a big society gathering is a good idea, it might well be worth looking into. Thanks very much for your offer to help out. If you want to have a think about how it might work, you could always email me directly to discuss ideas.