I think the best options are these... https://mikebelobradic.com/find-disney-princesses-disney-parks-walt-disney-world/
Magic kingdom has 4 princesses to meet and greet in Fairy Tale hall in Fantasyland. Merida (brave) is also in Fantasyland. In adventureland you can meet Jasmine and Aladdin. At Epcot, Mulan is in the China pavilion, Anna and Elsa are in the Norway pavilion...plus there are usually other spots in World showcase to meet princesses. Pocahontas is in Animal Kingdom. A great way to meet Cinderella, Prince Charming and the evil step mother and sisters is with dinner at the Grand Floridian's 1900 Park Fare. As you enter each park, be sure to grab a times guide with your map. That way you'll know locations and times for each meet and greet location.
Most of the princesses appear in Magic Kingdom, but they can also appear at the other parks.
Never got to see not even the characters too much rain.
Magic kingdom park
Magic Kingdom
Magic Kingdom mostly
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