I will add to kindms that of course security is going to be security. Often, some guys you encounter at the door may have just arrived and missed the security meeting so even if one of them say, "you can't bring that stuff in here" do not be deterred. Ask for someone with a walkie talkie, then ask them to call back for the tour manager, "is audio taping allowed?". They are only doing their job as they think it is defined; be patient, kind and affirmative (as in, you KNOW the band is OK with it).