Ocean City Today - July 18, 2003 Still Surfin' To Play The Park      OCEAN CITY - The popular Sundaes in the Park family concert series returns to Ocean City's Northside Park in July and August for a summer full of entertainment the whole family will enjoy.      The free summer concert series runs every Sunday through Aug. 24 with various music provided from 6-8 p.m. along with special entertainment for children. In addition, attendees can take the time to make their own ice cream sundaes for a small fee.      The 2003 entertainment line-up is planned as follows: July 20, Still Surfin' - Beach Boys Tribute and Karen Lyles the Juggling Lady; July 27, Randy Lee Ashcraft and the Salt-water Cowboys (country/beach) and Lollipop's Mother Goose; Aug. 3, "Frank and Patsy Cline" and Scales and Tales (live reptile and bird display); Aug. 10, Jesse Garron's Tribute to Elvis and Lollipop the Clown; Aug. 17, Mary Lou and The Untouchables (class rock/oldies) and the Magic of Mike Rose; and Aug. 24, U.S. Navy Band's Country Current and Sunshine the Clown.    In the event of inclement weather, the concert will be moved into the Northside Park gymnasium. The weather information line is 410-250-2124.