Annual Spring Dust-Off Car Show at Springfield Oaks County Park. For Pontiac, Oakland and GMC vehicles only. Pre-register $15.00 by June 3rd or $20.00 day of show. Swap spaces are $20.00 pre-reg or $30.00 day of show. Car corral is $10.00. Free parking - spectator admission is $4.00 15 years and under free.