Mickey meets in different outfits at his house, not just his regular outfit. You can meet Steamboat Mickey and Sorcerer Mickey at the Movie Barn and I think also regular Mickey. Don't go right at Toon Town opening if you want to get a Photo Pass picture with him. The first hour or so that Toon Town opens, Mickey meets out front of his house with a handler, but no photographer. Later he will be in the barn for pictures. The wait isn't too bad, and they play cartoons to entertain the kiddos. Also, Mickey and Minnie walk guests into Toon Town when it opens. So if you do go at Toon Town opening your kids can march down the street with him. My daughter got to hold his hand and walk in one day.
Minnie also meets out front of her house at the opening of Toon Town. Later in the day she does meets in her backyard/garden area too.