Black Hills' elk population sees increase   The state Game, Fish & Parks Department is increasing its population estimate for elk in the Black Hills. RAPID CITY, S.D. (AP) _ The state Game, Fish & Parks Department is increasing its population estimate for elk in the Black Hills. [url=http://bit.ly/124aKNy]The Rapid City Journal reports[/url] that a recently completed helicopter survey of South Dakota's portion of the Black Hills showed an estimate of slightly more t...