We very much enjoyed going through Shenandoah National Park, stopping at overlooks, doing a little hiking for views, and having snacks at the lodges along the way. (also nice views from the decks).
Also visited Luray Caverns, most enjoyable.
Took a drive to Winchester, a town noted for Civil War history (Stonewall Jackson's house/museum among other sites) -- many decisive battles there and the town changed hands something like 70 times. It also has a small house that G. Washington lived in as a young man during his first surveying job.
Had a private tour of an old home, and also went to the National Cemetery. Kind of interesting to see nice orderly graves for the Union army, and then to cross the street to see the Confederate cemetery with wooden markers and an air of disrepair.
Plenty to do onsite as well, the Mass. website has it all listed. We had a lower level Summit and enjoyed the space and accomodations. No oven or burners in those, so beware of that if you exchange into one (grill on deck and some hotplates/electirc grills, but it all worked out fine, hotplates were fine for breakfasts of pancakes/eggs etc.)