yes - all the cast (Smee, Hook, the pirates, Peter, Wendy and John) come into the show area through the little tables and chairs next to the toilets near the Chalet au Marionette. If you are in that area next to where its roped off about 5-10 minutes before the show is due to begin (or just after the show has finished), you should see them all and manage to get a few autographs and photos.
Not many people seem to know about this, a little boy next to us was delighted to get Peter's autograph (he was the only little child in the area) when one of the shows was just finishing.