Sometimes she is in the Judges Tent in Toontown Fair. SOmetimes she is in the Germany pavillion at Epcot. Check with guest relations when you get there and they should be able to tell you.
She's often at Germany in EPCOT near where the the Tapestry of Nations/ Dreams Parade use to start. She can also be found sometimes at the old Skyway Station in Fantasyland next to It's A Small World, at Town Square at MK (either outside by City Hall or inside the Expo Hall in the back of the Camera Shop) and in front of the Sorcerer's Hat at MGM.
We got there when the park opened last Friday and she was among the characters that rode the train with Mickey to open the park. After they did their "good morning" thing, she was on Main Street for the next several minutes signing autographs. She was so sweet to my DD and we got a GREAT picture.
Dh asked me today this question and I have No idea... Why do you think Snow White doesnt have her own castle... After all She is the 1rst princess... So why doesnt WDW make a bigger deal about her?