I have had the Thousand Trails zone pass for the last several years. I have the Southeast zone. I have saved a lot of $$$ with this membership. When I went out west, I added the Northwest zone and used a few of the parks in WA. There are several levels of memberships. If you plan to purchase a full membership, thoroughly research it. Resale memberships are popular and you can save quite a bit of money. On a scale of 1-10, I have found the parks I stayed in from a 5 to a 10.