Shenandoah National Park
Shenandoah National Park is a recognized dark sky location in Maryland for stargazing and astronomy activities.
Star party:
Shenandoah hosts a popular large star party annually.
Type
As a U.S. national park, various camping options may be available, including frontcountry, dispersed (boondocking), and backcountry (backpacking/primitive). A permit may be/is required.
For more info, see their website. See also all dark sky places in MD.