For a wedding gift, I gave my husband the Richard Petty Driving Experience, where you go around the track 2 or 3 times. We had to wait FOREVER for the Exotic class to finish, but from what I can tell, it looks pretty fun. You get a lot of time on the track in a bunch of different cars.
But if you're going with other folks, let me offer some wisdom. There is nothing else to do there except watch the other cars in NO SHADE. True, there was Cars playing indoors, but I've already seen it.

Lots of things to buy extra, but seeing my husband's face after he got out of the racecar was priceless. Driving back to the Fort he was saying "Ugh, this highway speed is soooo slow....."
If you can, plan your excursion as early in the day as possible. You might be able to beat the heat. There were no fights for parking spaces, though. Oh, and you have to find your own ride there. :/ Anyway, have fun!