Assuming it's the same setup it was in January - the FP makes it pretty easy. It was in DCA. They have (I think?) 3 sets of A&E going at all times in different rooms. When we were there we saw them several times, and the interactions vary quite a bit between the sets. Some were great, and some were... less great. My son is special needs, 4 yo, and was beside himself with excitement. One of the Elsa's kept looking at him like he was contagious, but one of the Anna's told him she was super happy he came to see her, picked up right away that he was "singing" the instrumental bits of the song, and gave him a huge hug. Moral - if you get a crappy set, you can come back and try again, haha.