It's a great time. If you want to park in the show, get there early. Really early. I'm usually there at 6:30am. I don't ever show my car ( I mean let's be honest, a stock ST with an accessport isn't much to look at ) but getting there early means you see all the cars. It seems that every hour or so cars rotate in and out. There's always some neat stuff to see. Plus, Katie's coffee has awesome breakfast burritos.
I usually have to leave Fredericksburg at 5 am to get there, but if that means not having to deal with the douchey street race type, it's worth it.