What is the advantage of being a member

I am a new caravan owner and member. Please can someone explain the benefit of being a member and if it is worth renewing my membership. I can stay on better camp sites than the CAMC at a cheaper price and I struggled to find a site with vacancies as it appears people block book and then cancel at the last minute, the insurance was less than half the price with an insurance company for the same cover that the CAMC offeted I just can't see any benefit in being a member, please enlighten me.