Hello Katherine!
Aw, thank you! We love our Guests and we are so thankful to be able to help plan their magical vacations. Thank you for stopping by and asking your questions. You are going to love the Frozen Fireworks Spectacular and I have heard that the desserts are definitely "worth melting for." The fireworks are scheduled to begin at 8:45 that evening, so you are correct, the dessert party will also begin earlier. When you check-in for your Frozen Summer Fun Premium Package in the morning, they will let you know what time your party will need to arrive at the dessert party that night. I'd plan for around 8:00 that evening and make sure your tummies are ready to indulge.
Disney dining is one of my favorite subjects and fortunately I was just at Disney's Hollywood Studios. We dined at the
Backlot Express and I thought it was very good. The menu choices were great and my Southwest chicken salad was scrumptious. There is also ample seating and I loved looking through all of the movie related decor.
I hope I have been able to answer your questions and assist in your planning, but if there is anything else I can do for you,
please let me know. Have a wonderful vacation, Katherine!
Magical Wishes,
Lauren