I just read your review, that sounds incredible!! I saw the Indigo Girls once in Foxwoods (near Boston) and they were excellent. I love their music. That must have been great, seeing them with that scenery!
We went to Biltmore Estates a year or two ago, there was a touring motorcycle meeting nearby and we went out for the day. It literally took us an hour to get to the main gate! Since we were only down for a weekend we stopped at the gatehouse to do a wine tasting there (which was really what we had come to do) and then had to go. But even that hour to get in was lovely!