We're long time members of the Caravan Club because we like the high standard and range of its sites and the 'rules' (nice rules :D), but we've never gone to rallies or anything like that (suspect a minority of members do). Its seasonal pitches are very popular and are always booked very quickly. It might have changed, but the allocation of seasonal pitches used to be done centrally and you could select 2nd and 3rd options if you didn't get your 1st choice. Most people booking seasonals stay almost every week, otherwise it's not such good value (that might not matter to others though).
But I think a tourer is a different kettle of fish to a static. To start with you need a car with a towball to tow the van, and to be able to drive and manoeuver with the van attached (you can buy a mover, but they're not cheap). Plus with a tourer you need to think about all the utilities that you're not hooked up to with a static: water; gas; loo; electricity and TV. You sort these for yourself when you arrive on site with a tourer and have to monitor some like water, loo and gas during your stay. There's loads more to think about with a tourer than with a static, or at least think about them in a different way. A static is much more like a home from home than most tourers. Seasonal pitches for tourers make like easy, as do fully serviced pitches, but it is still more work - usually for the males though! 
Incidentally even caravaners can be snobs, looking down their noses at older vans and I confess I didn't like the Caravan and Camping Club because is seemed more down market than the Caravan Club. 