We also went to Rocky City on our trip while in TN. We really liked it and were very tired afterwards. There were alot of stairs but really great views.
We didn't have reservations for a hotel in Chatanooga which was a mistake since there was a huge softball thing going on and the only hotel we could find was the historic Chatanooga Choo Choo hotel.
Aaron was thrilled about all the trains.
The lobby of the hotel... used to be the train station
We made it to Chatanooga TN with enough time to also visit the aquarium. AND a man was nice enough to give us his member tickets on the way in so we got in for free. A savings of $100!