Take US-82 W to Winona and get on I-55 N. Follow I-55 N to the Grenada exit 206 (MS-7S/MS-8; don't take the South Grenada exit). Turn right at the end of the ramp and head into Grenada. Drive ~2 miles down this road (Sunset) and look for a KFC on the right. At the next lights - the junction of Sunset and Commerce Street (US-51/MS-17) - turn right.
Drive past one set of lights and take the next left turn onto Charger Drive. You should see the high-school baseball field just before the turn.
Follow Charger up to a T-junction at the school. Turn left and follow the road around the school. The football/soccer field is at the back of the school. There is lots of seating at the stadium and there is no need to bring chairs.
Total Driving time: ~1½ hours