Henry Kaufmann Campgrounds | 256 followers on LinkedIn. Home of Jewish day camping in New York | The Henry Kaufmann Campgrounds (HKC) has enabled hundreds of thousands of children to have fun-filled summers of camp since 1953. Comprised of three sites - Long Island, Rockland County and Staten Island – HKC serves as home to 11 independently run Jewish day camps in the greater New York area. Our mission is to enhance the day camp experience and provide a safe environment for the campers and staff who call our grounds home.