BNA11 is now available on the Conference Week Events (ConWeek Events?) link and lists transportation and 6:00 start time. Any info about the buses running continuously or just out and back once?
I think in the past they've always had them running back and forth. It looks like it's only about 3 miles to the venue, so it would definitely be doable to run do it that way. Probably a cheap Uber ride to if not.