We enjoyed this meal last trip and are going again this year. Donald, Mickey, Goofy, Daisy (in their safari gear - very cute)... can't recall if any others. I read on the DIS that Donald is only outside for a picture, not inside. I don't remember noticing that but it was seconded...
Food was good, much better than what we ate at our other character buffet at H&V (lunch). Breakfast buffet - donuts, pastries, ham, waffles... the usual fare but everything was fresh and tasty.
Crowded and loud as you would expect. There was a cute little conga line with the kids and characters was fun and made for some great pictures. It was a nice start to our AK day and very close to KS to grab a FP before checking in and ride Safari after.