Buster before you go off adhoc buying any membership whatsoever think about how realistically you intend to travel and your needs/expectations in a CG.. How often/days and most importantly where. Then check the websites of each membership. For example you can look up locations for PPA on their website and see how many potential CGs might work for you. We generally hear a 50/50 split give or take on the PPA availability in an area and how the CGs are. There are some folks that are KOA specific during their travels and others that personally don't care for them feeling they are too overpriced for what they need or facilities they would use. Then there are others that want to be COE, SP, NFS, BLM (basically more rustic/rural camping so then depending on the state/province you may want to look into other types of passes such as New Mexico does an annual pass for CGs for $225, or InterAgency/America the Beautiful Pass can be beneficial in places like Lake Mead as well as National Parks for a year for $80. There's also LTVA passes for places in AZ and Ca. Seriously Buster, before you part with your money, decide on at minimum how you intend to travel, when and where and for how long then do specific research on what might work the best for you. Do you need FHU's or are you likely to want to be more off grid?
You are in California so you might find Escapees of interest and the cost is only $30 a year now instead of $60 as I believe it was before.
Another one that many like or dislike = again you'll hear a 50/50 split on comments generally is Thousand Trails, that does a zone pass or many will buy a resale one.
Just as some prefer a 5er over a TT over a MH or B or C series the same applies with all these membership options, first consider how you will travel, then research each program options and add maybe one or two at a time.
Just my 2cents FWIW.