... Whilst it was still in Fletch's head.
That said, could it be an extra-sneaky plan? Use that psychological trick (so beloved of Team Rocket) where you wear a disguise so transparent and obvious that your foes minds literally cannot believe anyone would try a disguise that bad and that, therefore, you must be who you claim to be.
"Hi, we're clerics!"
"Um... you look like a bunch of bunnies in ill-fitting robes to me! But no-one would be that stupid so you must be clerics! Enter, friend!"
"Maker be with you, my son."