I'm going on Saturday, and if it's really good, I'll go on Sunday, too. One of my brothers, his daughter (who is 13 and a great rider) and a buddy are coming from NC.

I don't know if they are expecting to sell out. I doubt it. My ticket number is 76, so I'm guessing that I'm only the 76th person who's ordered tickets. The convention center is very large. I bet you would be able to buy tickets at the door for anyone who decides to come down the last minute.

If you come by Amtrak, be sure to go to the Main Street Station, not Staples Mill. It's a bit of a hilly hike, but certainly walkable. The only problem is that there are not that many trains that come to the Main Street Station, so it might not work out for you.