CRT: Cinderella typically greets at the door
Aurora, Jasmine, Ariel & Snow upstairs, sometimes when someone isn't feeling well you can catch Rapunzel or Merida in here, but it's rare!
Akershus: Belle at the door
Aurora, Snow, Ariel & Cindy inside, but again, if someone isn't feeling well there's the slight chance of getting Poppins, Alice or Mulan inside!
The variants are VERY RARE, and only if someone is sick and the spare isn't there yet kinda thing.
The tea party has just Aurora for princesses.
I PERSONALLY like Akershus a whole lot better, I think it's a little bit cheaper, it's easier to get into and I like the food quality better. You get the cold buffet and a hot plate at breakfast or cold buffet & entree/dessert at lunch & dinner.
As for finding Aurora, she is no longer in Fairytale Hall, but can be found at the front of MK, or in France in Epcot multiple times each day.