Slippery, I guess shaking hands with a few hundred thousand people is quite difficult for the band and they never ever could hold an intrument afterwards LOL.

In most venues small cameras without a zoom are tolerated even though originally cameras aren't allowed at all. You always take the risk that they take it away from you. So it's up to you if you want to take the risk. Until now I never had problems to get a camera in but it can always happen that they take it away from you.