Actor Mark Lenard (1924-1996)
Mark Lenard was born Leonard Rosenson. Jensen's RV Park was "Rosenson's Lake Park Resort" in the famous roaring 1920's to the 1950's resort era of South Haven. Mark grew up in what is today Jensen's RV Park, and eventually moved to Chicago. He is most famous for playing Spock's father "Sarek" in the Star Trek television series and movies.
Below our office is still visible in the middle right of the postcard.