I'd already thought of the wigs think, but to be really cunning they could wear wigs that were obviously wigs but were actually pretty similar to thier orginal hair style. Kind of a double bluff, because why would a blonde be wearing a blonde wig?<br/>Oh and coloured contacts might be handy to throw off descriptions.<br/>Raven does have a pretty distinctive tattoo, so either some way of covering it up or go the other direction and add henna tattoo's to confuse things