What should I expect going to the U2 360 Concert next month in Oakland?

Everyone will be on their feet singing and cheering. Follow the crowd. Bring your camera. No camcorders. Most cameras have a video setting. Most of the time they just let you right through and not even check you. I saw AC/DC there and Kiss and had my camera and took a ton of pictures. Don't worry about the crowd reacting to you singing because you will see that they will all be doing the same thing. Nobody will even notice.