flash camcorder for pop concerts

Hi can anyone suggest a camcorder for use in taking videos at pop concerts. It needs to be small as anything that looks like pro recording equipment is not allowed. It needs to be good in lower light and have a fairly good optical zoom. It should have good storage with cards and have good image quality on recordings. Sound should also be good. Failing a cam would it be just as good using a 1080p still camera such as a lumix dmct27? If i was using a camcorder I'd probably be using a still camera as well. Any advice much appreciated. Thanks.