There's a file in the Nuns on the Run page which allows you to print small "reference maps" that you can give to each player. We use these as well as player screens to help the novices be as sneaky as possible:
That's exactly what we do. We pass out portable maps to all the novices. I'm usually asked to run the guards (Prioress and Abby) so I also make a point of not watching their eyes to make it more fair for everyone.