Passport America (
Passport America Discount Camping Club - The Original 50% Discount Camping Club Since 1992) and Good Sam (
Good Sam RV Club). We have both, There are no strings to a PA membership, just 50% off at member campgrounds. Current membership is $44/year. There may be restrictions, particularly in season, at some of the member campgrounds, but they are spelled out in the book (or CD) listings.
Cliff