I'll probably be there in May having come in from BWI and am looking for suggestions of interesting things in the area. I've been to downtown DC quite a few times so I am looking more for things northwest of there. I haven't been to the Air&Space at Dulles yet so I'll probably drive down for that but I'd probably have both Saturday and Sunday and maybe Friday afternoon to do whatever. Beer, wine and hiking tend to be towards the top of my interest list. Thanks guys!