With the girls, I would go for 1900 Park Faire for dinner.
California Grille may be good for an adult dinner alone, but the ambience will likely not compare with seeing the characters at dinner for girls of kids' ages.
As for Liberty Tree Tavern, the characters were good, but we were not at all impressed with either the food or the service.
If the food, service and characters at 1900 Park Faire are anywhere as wonderful as the breakfast there, you will not be at all disappointed, and I am sure that your girls will love seeing Cinderella, Prince Charming, the mice and the Fairy Godmother.
Bon Apetit!