Landmark has a training center and NJ headquarters in Edison, minutes away from East Brunswick. They have a presence on most college campuses, including the one that my naturopathic physician graduated from.
Chabad Lubavitch has a similar stragegy as does Campus Crusade for Christ. The latter, Billy Graham's organization goes after freshmen and sophomores mostly. They figure that jr. and srs. basically know what they want to do with their lives.