Hide your camera in a strategic place and make sure to get in the line where a person of the opposite sex does the searching. I had no problem getting it inside during the Montreal show, while they were clearly searching for cameras.
And a note to Valeswood: You don't need a flash for the light. You only need it, with an automatic camera, to make sure that the shutter doesn't stay open too long. I cover the flash with my finger or tape it with a little piece of black electrical tape, works perfect and no one sees the flash.