Either day is good. This is actually the world round, so it should be pretty amazing, no matter who you watch! In case you don't know, U.S. riders (or the majority of them anyway) don't hold a candle to the top world level guys.
I would assume that the 2 days of events are, in effect, 2 seperate events that happen to be on the same venue. I'm not sure about this though, so someone please correct me if I'm wrong. A lot of people say that Friday is actually the best day to go. This is the practice day for the compeditors and the world guys set up a couple sections and try to out-do each other.
Have fun with it :thumbsup: . If I hadn't just gone all the way down there for the training session that they just hosted, I would be down there in a shot!