Yes, Minnie is always (as far as I know) at Chef Mickey's. You can also find her at the Cape May Breakfast, but she is wearing swim apparel. At Chef Mickey's, she is in the classic red polka dot dress.
As far as Daisy, the only place I know she appears for meals is at the Tusker House Breakfast in Animal Kingdom.
As for CRT, the princesses we saw when we went last Sept. were Cinderella, of course, but she was only at the entrance for photos. At the actual breakfast we met Aurora (Sleeping Beauty), Snow White and Jasmine. Most people say they saw 4 princesses during the meal along with Cinderella downstairs, we only saw 3. However, I think the princesses who are there can vary somewhat.
As far as the Fairy God Mother, I don't think she is appearing at all at CRT anymore. She used to be at dinner only, but I think they changed that to be princesses as well and she will no longer be there. We did meet her outside the castle after our breakfast, but I'm not sure she is even going to be a character in MK any longer. I could be wrong, I actually hope I am, she was so sweet with my girls.
I think Mary Poppins does appear sometimes at princess breakfasts, however, we never saw her.
Arkeshus, the restaraunt in Norway in Epcot has a great princess meal too. We met Cinderella, Snow White, Ariel in wedding gown and Aurora at that meal, along with Belle, who was taking photos.