Wow! I'm really impressed with all the quick feedback I got from you guys. Reading over my original post I probably sound kinda grumpy but anyone who knows me would say I'm really laid back.
Anyways, I'll look into the areas suggested. I fear I may have to go outside of Texas to get what I'm looking for. My folks live in El Paso so I might hit up New Mexico or something.
ToeJam: Your idea was suggested to me by my camping buddy. We pass a lot of fenced in land on the way to some of these parks and we've wondered if there was some logical way to get a hold of the owners and ask if we could spend the night or something. But we were afraid of getting a shotgun shell into the air over our heads too.
If I do find something I'll keep you posted! Thanks again guys!
B0