In the past I have had the following memberships: Good Sam, KOA, AAA. I have now eliminated the camping specific memberships, I maintain my AAA because most Good Sam parks honor AAA with the same discount, KOA parks are specific, but I only stay at them once about every 3rd year, most my camping is with state parks, national forests and national parks, and whenever possible we boondock, that is by far our favorite and comes at the best prices.
KOA is fine, but pricey, and not everywhere you want them
Good Sam is fine, but mostly too commercial for what I want.
AAA works for the discounts in a lot of places, and offers the other advantages of the AAA membership, no I have not yet added the RV to my AAA, someday maybe
2011 Dodge Ram 2500 Cummins
2012 Starcraft Autumn Ridge 297 BHS