I've only attended one Road Show, two years ago. It is about a 2 hour drive, but the closest to my area. I was going to go last year, but I never seen the event scheduled (?).
Anyway, I went 2 years ago thinking I might come home with one nice guitar, but I did not. There were way too many people playing all syles of music which is good, but as stated before, it can be hard to hear the guitar(s). Being able to gain some knowledge about Taylor and to be able to hear demostrations was valuable to me. A very enjoyable event and I look to go to another one day.
Oh, arriving early and playing a guitar was not possible at our event. The doors were locaked keeping everyone outside until about 15 minutes before start time.