While in Epcot during the week of June 12-22, we saw Princess Aurora all by herself by the bridge between England and France. She was in a shaded place on the walkway towards the Friendship boats to the resorts. We talked to her there everyday. She appears in the afternoon shortly before 1:00. In addition to here, Belle is in a room in France, Jasmine is in a room back by the restaurant in Morrocco, and Snow White was usually in front of the German pavillion. There were little or no lines for any of these princesses while we were there.
In addition, the Disney characters usually ride a bus to the entry point of the countries and, as already stated, not many people or kids were around at that time.
This may have changed with the summer now in swing, but we had one-on-one time with these characters.