I just got back on Sun, and I can tell you were I found some!!!!!!!
Here are my tips:
For MK, go to Toontown right when they are about to open (10:00AM), and beline to the Hall of Fame tent, they have three lines set up and I got right in the Pluto, Minnie, and Daisy Duck line. NO wait!! Then I got done and went right back in line for Goofy, Chip and Dale, no wait!!! The third line was the princesses, which was VERY long, so I skipped it.
In epcot, by the American Adventure about 12:00pm, out came about 10 characters!!!!! I saw Mickey, Mr smee, chip and dale, Baloo, two of the mice from Cinderella, Snow white and some other bear I didn't know.
In Animal Kingdom during EMH morning by the intersection to Asia we saw Rafiki, and Baloo. We went to the Camp Mickey-Minnie right at 10:00am again, and got right in line and saw Mickey and Minnie again.
In MGM, we saw Goofy, Mickey and Pluto by the Hat, then went to the back of the park to Mickey right at 10:00am and saw JoJo and Goliath, Annie and Quincy from Little Einsteins and also saw Lightning Mcqueen and Mater!
Hope you get lucky like I did!!!!!!!!!!