Looks like a Sturgis on steroids...about 400,000 people showing up. I have never been, even though it's only 1.5 hours away...I might be interested in seeing 0.01% of the actual bikes there...not my cup of tea.
I have been to smaller rallies or bike nights (Wednesday night on Beale Street in Memphis for example) and you see some amazing custom bikes...but it's only a few hundred people, not 1000's.
Unfortunately the ride down is not that interesting either...all freeway...not even that exciting a ride.