In honor of the Legislative Correspondents’ Association annual show tomorrow night, we thought we’d set the scene for an earlier show, the association’s 71st in 1971. The play that year was a Camelot spoof, starring the A.P.’s Charles Dumas as King Laughsalot Rockefeller and Charles Holcomb of Gannett News as T. Merlin Hurd, the king’s…