Yes it is a pay once kinda thing. You get a wrist band. This is our first time attending but I will be brining lots of water and sun block. Will probably bring a pop up tent thingy but not sure if we'll set it up. Not going Friday as I will just be getting back but will go Saturday and probably Sunday. He's the web site if anybody wants it.
http://www.texasmile.net/index.php