Thousand trails resales vs zone pass?

We have had a Zone Pass for 2 years now and have found it to be a good value as we use between 40 - 60 nights each year. We purchased it when it was buy one/get one so had 2 zones the first year. Then they asked us to attend a web conference and gave us an extra zone so we now have 3 (SE/SW/NW) for no extra cost :). The web conference was a very low pressure sales presentation showing all the options available so do attend if asked ;)

Also, we had a ready-camp-go card the first year for $99 but found we hardly ever used it since most of the Encore parks are also Passport America and that is usually cheaper....