Maryland HotelsWith 18, 19 and 20 Check-In Maryland Cities With 18, 19 and 20 Check-In Hotels A Aberdeen Annapolis B Baltimore C Capitol Heights E Easton F Frederick Frostburg G Gaithersburg Grantsville H Hagerstown O Ocean City Oxon Hill S Salisbury Snow Hill St. Michaels Suitland T Tilghman Island Timonium