http://cincyscca.com/autocross/scheduleresults/
Registration links are on the schedule above. Saturday is a limited entry t&t for $75. You'll run all day except for a 1 hour-ish work assignment. You can probably get 40-50 runs in if you want.
Sunday is just a normal fun event. Probably will get 6 runs or so.
This is actually out on the concrete pad at the Wilmington Airport, so unless you're a nationally competitive guy that goes to Lincoln, NE, this is by far the largest and grippiest site around.
If you have ANY questions about autocrossing before you sign up, please let me know and I'll be happy to answer them. If you're new to the sport and come out on Saturday, I'll go on plenty of runs with you, and you can go for plenty of runs with me if you want some instruction!