Two years after it first proposed plans for a stadium complex on the grounds of the former Crownsville Hospital Center in Anne Arundel County, the Chesapeake Bayhawks are pitching their "final vision" for the project. The Annapolis-based Major League Lacrosse team presented its latest concept for a 470-acre site called Chesapeake Park, as well as an economic analysis of the project, to County Executive Steuart Pittman Monday, Bayhawks President Mark Burdett said.