After serving as Executive Director of Appel Farm Arts and Music Center for 29 years, Mark Packer is stepping down. A spokesperson for Appel Farm in Elmer announced on Thursday that Packer will become the new executive director of the South Orange Performing Arts Center. The move should not effect programming at the Landis Theater in Vineland. Appel Farm moved most of it’s concerts and children’s programs to the newly renovated Landis Theater last April.