At the Philly concert back in September, I stuck my camera inside of my makeup bag. They didn't really think to look inside of it, so that worked out pretty well. I also have another trick... Whenever I saw Blondie in Cleveland last week, I brought my disposable camera AND my digital camera. I put the disposable one in the front pocket, and I put the digicam in the back compartment of my purse so nobody could see it. The reason why I brought both of them was because if one was taken, I had a spare *lol*. You could luck out like I did and they won't even check your purse.
Hope that helps
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-Kate