Take a picnic lunch, the drive up is awesome. When you arrive, you can drive across the top of the dam and walk across it. Had an observation deck as well as walkways down both sides of the dam. You can continue driving on to the Tail of the Dragon, an 11 mile road with over 300 curves in it. Great info in the visitors center. I purchased the book, Fontana, in the gift store and it was fascinating reading. As a matter of fact, I am thinking on booking a stay in Fontana next trip for the views and water activities that abound there.
Great scenic and educational trip for sure. My nine yr. old son was very interested except for the fact that he could not go into the main building that he had seen on TV. They should consider tours in there.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.