I don't have details on this event, but if they run it like the PCA events at Zephyrhills airport, it will be a pretty casual affair with no pre-reg required. You'll have fun. Hopefully someone in the know will respond, but just in case:

Entry fee should be somewhere around $30-35.

Your car merely needs to be safe. Good working order, tires not showing cord, battery tied down, throttle return springs working, all lug nuts and other critical hardware in place, trash and junk removed. Nothing special, just give the car a once over, make sure everything is tight and required stuff is present, and take out the trash.

Here's their info page if you haven't seen it:
AutoX

Gobs more novice info can be found here:
Novice Tips » FAST

Good luck!