Over decades, many groups have made use of the Camp at Old Mill facilities. The incomplete list include
First Baptist Church of Pequea, Gap, PA
Grace Baptist Church, Brooklyn, NY
Wagontown Union Chapel, Coatesville, PA
Lancaster Bible College, Lancaster, PA
Calvary Fellowship Church, Downingtown, PA
Calvary Chapel, Philadelphia, PA
Willowdale Chapel, Kennett Square, PA
ThreeSixteen Skateboard Ministry more
Faith Bible Institute, Everett, PA
Gateway Church, Parkesburg, PA
Providence Church, West Chester, PA
Parkesburg Point Youth Center, PA
Sandy Hill Community Church, Coatesville, PA
Olive Street Presbyterian Church, Coatesville, PA
Conestoga Church of the Brethren, Leola, PA
Cherrydale Baptist Church, Arlington, VA
Young Life of Chester County, PA
Calvary Chapel Mercer County, NJ
East Brandywine Baptist Church, PA
Neshaminy Valley Baptist Church, PA