This ng is for anyone who's interested in real ale. Whether or not you're in CAMRA is irrelevant.
You've got OTOH a very big organisation intrested in real ale, and a ng for real ale, so often there's going to be an overlap, but that's just accidental. If you want to come here and just talk about beer, then that's the main thing. That's all that anyone wants to do. And if the CAMRA members amongst us do mention CAMRA in passing, it;s not that we're trying to dragoon you into joining or anything.
Personally speaking, I'm very glad I joined CAMRA. But this ng has nothing to do with CAMRA per se.