Take Hwy 82 East to Alternate 45 South to Meridian. Stay on Hwy 45 south - do not take the cut off to I-20. This will take you into Marion.
You will come to a 4-way stop after ~1 mile with two gas stations on the corners (Chevron and Conoco). Turn right onto Lindley Road and follow this road for about 4 miles. You will cross Hwy 39 (a 4-lane road) and along the way Lindley is renamed North Hills Road.
After ~4 miles you will approach the top of a hill. Look for the intersection with Poplar Springs Drive - it has a drugstore with a neon "drug" sign on a clock tower on the left corner of the intersection and a Pizza Hut on another. Turn left onto Poplar Springs (a residential road) and drive for ~1½ miles past the junction with 32nd street. You will see the Meridian High School football stadium below you on the left. The parking lot is accessed from Poplar Springs just after the stadium.