Keep a running list of states that have 'good deals on camping'. Like put Texas on that list. Stop at the information center when you enter the state and ask for a Texas Campground brochure. It is put out by the Texas Association of Campground Owners, TACO for short. It is free but it has a member card in it that gives you up to 15% off at campgrounds that are associate with it. So some parks are Passport America, Good Sam, TACO and Escapees. In Texas, Passport America is best, TACO is second and Good Sam and Escapees are down the line. I don't expect to renew my Escapees when it expires, but I will the Good Sam as it is better than nothing. But you can over do the campground things.
Like Beth said, the State Parks can be a good thing if you will use them "worth your money". But otherwise, not a good deal. Just get your calculator out and figure how many nights it will take to pay off the card. Most people get their money back on PA in 3 nights. And if someon refers you that person gets $10 towards their next renewal and that makes it a win - win. I just referred a guy in the campground today. It's just a good deal.
If you are ready to go get that rig in Houston, I'll meet you at the airport and take you down there, but it will have to be this fall. Then I'll follow you to West Texas to be sure you got it down...like you need that
. You know any excuse for a road trip is better than none.