From Reading:

1. Take Route 222 South to Adamstown.
2. Turn RIGHT onto Route 272 and continue on 272 into Ephrata.
3. In Ephrata, turn RIGHT onto Rt. 322 North and drive less than 10 miles into Brickerville.
4. In Brickerville, you'll see traffic control people. Park where instructed (probably on the church parking lot). The picnic grove is directly across the street from the church. 

Alternate route:  Brickerville is just south of Interstate 76, on Route 322.