Nick, I'm a BS member and I reckon it's worth joining.
Keep an eye out on the BS or BFW websites for the next event. Go along and see if it's for you.
My preconceptions of the BS were all wrong. Many of them use Carbelling gear, most are just 'normal' and even the floppy hatters are fairly normal. They might not look it at first though!
I'll be at the Wetherby meeting too. It would be good to meet a few FM members.