The Frozen Dessert Party at DHS is awful. It is very disorganized. If you don't meet near guest relations at 5:30pm for your tickets, you're told to go all the way in to the party (which is near the Lights, Motor, Action! Stunt show). We were the first there. We were seated in a prime location to enjoy the Osborne Spectacle of Lights, but the view was mediocre. Not worth it for sure. Besides that, you had a window of time to do one of two things: Watch the Frozen play with priority seating, or wait in line for the Dessert party seating. You could only choose one or the other.
Unofficial Guide followers: do not do the dessert party. It's not worth the money at all. Wanna watch Elsa? Buy the movie.