We have KOA, Passport America and Good Sam. We use whichever one applies for the direction we are going. I find the Passport America gives the best deal however there are a lot of restriction on use. By far we use our KOA membership more than the others. We just like what they have to offer. Their bonus points build up too. Right now we have 2 free nights. Most of the other private campgrounds offer discounts with the Good Sam card so that's a good deal. We would like to stay in the State, and various government parks, but we plan our stops 4 or 5 days out and change our routes often so they usually are full. One thing about the KOA though once we mention we are members they always seem to fine a spot for us.