Hi Ant,
I'm the chairman of Glos/Worcs so might be slightly biased but I would agree with Mary that cming to a meeting could help decide. I live in Bourton and work in Bledington which as you know is right on the border of Glos/Oxon.
I'm also happy (with a bit of notice) to meet up and have a quick coffee to tell you more about us if that would be of interest?
If so, drop me a message either through the forum or directly to
chairman@gw4x4r.co.uk
Best wishes
Ashley