We did indeed have a get-together this year. Back in early September, 13 Airstreams got together in the Forest of Dean, not a million miles from you. There are some pics at..
Tracey & Pete on the road: The Rally Call
We'll be doing it again in the Spring and late Summer next year. If anyone's interested, PM me and I'll add you to the list.
And Chiefy, you're right - it is 250kg, but only if you're careful with loading of the car so as not to exceed the rear axle limit, otherwise it's only 150kg.