Schedule this tour for your first morning in Nashville, you will not be disappointed.
I booked online a couple of days prior to arrival however I suspect you should probably do so further in advance during high season.
The morning of, I receive a reminder about the tour and meeting spot which, I think, is great.
Ryan was our tour guide and he was just the right amount of informative and entertaining.
The tour goes around downtown and the pace was slow enough so everyone could keep up but fast enough that we weren't dragging our feet. Also, each stop had historical significance (obviously) which Ryan would tell us about; again, we would stay just the right amount of time - long enough to have a good look and short enough that I wasn't wondering when we'd move on.
I enjoyed the tour very much and would definitely do it again. Thanks for an outstanding activity Ryan!