Vacation with the family is finally booked (it's been a process). Anyway, we'll be staying in Falling Waters, WV in mid-July. We're hoping to dog Gettysburg one day, maybe send some people to DC to walk around & explore. Any "must see" things to do in the area? There will be 8 adults, 1 - 2.5 year old, 1 - 1 year old, and at least 1 dog.