GA is much better, as you can wander around and find the best places to watch on Friday and Saturday. This year GA tickets could sit in the grandstands lining the end of the backstraight going into turn 15, but who knows if they'll allow that next year. It is a good spot to watch from.
Turn 1 is also good, there is a big screen there so you can see the action everywhere else on the track.
Cameras are allowed, everyone had them.