Quite a few years ago we were lucky enough to get annual passes and make 4 trips to Disneyland in one year. The first trip we met a wonderful Snow White and Princess Aurora. When we returned a few months later these same two princesses were in the park and they remembered my daughters from before. It was just some off hand comment like "I see my two little friends are back to see me. You must have had lots of fun last time you were here." I took photos of the girls with the princesses and made a point to mail them to Disneyland Resort with a note saying how wonderful the made our trip. Just before our next trip, the girls recieved a black and white photo of all the princesses together and it was 'autographed' with each of thier names on it. During our third trip we again saw these same ladies and this time Princess Aurora looked at the girls and said "Ashley and Allyson I have missed you so much." I stood there in shock (tears in my eyes). That princess sees thousands of little kids and she remembered mine. Needless to say we again wrote to Disney (sending photo's) to tell them how wonderful these princesses were. After our third trip we received a hand written letter from Snow White on the most beautiful paper. She had a little story for the girls about the dwarfs. We still treasure these trinkets from Disneyland.
The address we have sent our Thank yous to in the past is
Disneyland Resort
P.O. Box 3232
Anaheim, CA 92803-3232
Hopefully it still a current PO box for them and keep your eyes on the mailbox for their repsonse.