- Camp Hill's Best-Kept Secret! The recently remodeled Oyster Mill Playhouse is nestled on the banks of the Conodoguinet Creek in East Pennsboro Township. Each year, the Oyster Mill Playhouse, a non-profit community theatre staffed by volunteers, presents a season of high-quality productions including musicals, comedies, mysteries, and dramas. They are staged and performed by some of the area's ...www.oystermill.4mg.com