Southern trails & c2c parks?

I see ST online for $199 & frozen dues. Then I see that some have paid almost $1k. We are interested in Deluxe c2c access. Do they charge different amounts at ST depending on whether you want deluxe options as part of your package? Have you found that the trip planning assistance is worthwhile? What do you have to do to quit ST if you decide you don't like it? Any other deluxe c2c parks you would recommend instead, Maybe Arizona or Texas for about a 1K price tag or less?