We just went this last December and found that she was right outside of City Hall as you enter the park at MK. This was a daily morning character greeting they had and there were maybe 10 or so characters out with lines forming. Just ask any CM while you are there and they will give the meet and greet times. My DD was so excited because she wanted to get a pic of her with Sleeping Bueaty in her pink dress and this was the only place we have seen her in her pink dress. We did have her pic taken with her a few years ago at the castle but then she was only in her blue dress. If you'd like to see a pic just check out my thread here. My DD had her lanyard taken and I have a thread with alot of posts but if you go to I think maybe one of the last few pages you will be able to see some pics of my DD and one of them is with Sleeping Beauty!! You can always go up to any CM at any park and ask them when and where you can see a particular character and they will call and find out for you!! Good Luck!!
She's been out doing meet-and-greets a lot more now than she use to. On top of the Princess Breakfasts, she's often in Town Square in front of the Expo Hall at MK in the mornings and at International Gateway at EPCOT.