GREAT MILLS — A new concession stand has opened at Chancellor’s Run Regional Park, bringing food and beverage service back to the popular St. Mary’s County facility. The CRRP Concession Stand operates from the Hall of Fame Building at the center of the park. Stacey Ray Seldon of Giselle’s Catering manages the stand, which offers pulled pork sandwiches, hot dogs, fries, macaroni and cheese, ice pops and assorted beverages. Chancellor’s Run Region…