The zone camping pass is the entry level Thousand Trails membership level. The pass allows campers to stay up to 14 nights for free at campgrounds in their zone.
A classic membership includes camping at all wineries, breweries farms and other attractions. Upgraded memberships also include camping at golf courses.
Good Sam is a popular RV discount club that offers a discount at a huge number of RV Parks across the nation. The majority of the discounts are only 10% off the nightly rate.
Coast to Coast RV resorts is a network of RV resorts across the country. They have hundreds of RV parks where members camp for a discounted rate (typically $10 per night).