I'm not sure how close Dixieland Speedway is to were you are located, but the ARDC Midgets were there on Aug. 6th.
I believe ARDC has a long standing history of holding a race in NC each year.
I know this won't help you this year, but if you are there next year check them out.
http://www.ardcmidgets.com/
http://www.na-motorsports.com/Tracks/NC/Dixieland.html