They run them the same as their TTs in Mineral Wells. That is, you get about 30 minutes of half-speed practice in the morning. They will divide everyone into two groups where one group drives first and one group works first. They send out three or four cars at a time to do one warm-up lap followed by three hot, timed laps. Then you get another set of three. Then they switch workers and do the same. After lunch, it gets repeated again. If time is short, they will only do a single set of four hot laps in the PM. So, you will get 10-12 timed laps.
You need to arrive pretty early, like 7ish. I remember it being dark last year when I was cleaning out my car.
They are a good time.