The site lists different things the group is about. I'm still not sure what they mean by "real ale"--as compared to what?
The major distinction is between how the beer is stored and served. The major breweries have a vested interest in promoting "keg" beer which is pressurised whereas CAMRA are advocates for "cask" beer which is the traditional unpressurised method of dispensation. There is a world of difference in the taste - cask is much more pleasant. sjc
So they're not about also brewing "real" ale from malted barley (vs. other grains?)
Well part of it is preserving traditional forms of beer. They definitely support Budvar over Budweiser partly because the latter uses rice, but mainly because Budvar tastes better and has just as much (in some people's eyes a better) claim on the name Budweiser.