If i remember correctly, the brochure/map you get when entering the park now has the time and location of character appearances. There are also locations in each park that certain characters always appear. For instance in Animal Kingdom it is Camp Mickey Minnie which is near the Lion King Festival. In Magic Kingdom, there is Toon Town. In Epcot, they have a new building across from Mission Space ( well the building isn't new but the characters appearances are). And in MGM ( hollywood studios) there is a line of " trailers" that have preschool characters. There are other character locations, but these I mentioned are set aside just for appearances. Look on the brochures, they should have listed which characters will appear and when.