I went last year, for the first ever A1GP race. I walked around most of the track. The best place to stand is at Paddock (obviously!) but this is where the majority of the people are so unless you are there super early you won't get a good view. My mate and I stood on the outside of Druids for the first race, but then walked around and stood on the inside of Surtees at the end of the Cooper Straight. In face, Robbie Kerr broke down just in front of us (perhaps I'm jinxed!)
Anyway, I can't go this year because I'm on night shifts next week. If you are going, enjoy yourselves.
Martin