Yeah, like everyone else said, Town Square is great for meeting the Fab Five and Chip & Dale. If you have a chance, Toontown Morning Madness is great to meet the Fab Five + Chip & Dale in a more relaxed, less crowded atmosphere. They interact a bit more, and you don't feel rushed, so you can get more pictures and more interaction. But even without Morning Madness, we were just there last week and saw the Fab Five + Chip & Dale at Town Square every day (not all day, but mostly in the morning when the park opens and early afternoon we noticed). At Pooh Corner, Pooh, Tigger, and Eeyore are the norm, but the CMs said that during busy summer days, Rabbit and Piglet may make an appearance. We also saw Cruella, Mary Poppins, Bert, Pinocchio, Aladdin, and Jasmine at Town Square/Main Street; Mad Hatter and Alice near Pixie Hollow; Mulan and Mushu at Pacific Wharf at DCA; Lilo, Stich and the Fab Five + Chip & Dale at Sunshine Plaza; Woody and Jessie at both Frontierland and across from Toy Story Mania; Snow White, Aurora, Cinderella, Peter Pan, Woody, Sorcerer Mickey, and Pocahontas at various times after "Drawn to the Magic", and the Fairy Godmother from Cinderella near Sleeping Beauty's Castle. But in the summer, they usually have a lot more characters roaming around, so you shouldn't be short of character meet and greets at all.