Hi Michelle,
Your trip is coming up very soon - how exciting! We had the opportunity to experience
Symphony in the Stars: A Galactic Spectacular last month and let me say it's really impressive. Most impressive.
The fireworks center over Grauman's Chinese Theatre and best viewing locations are around Center Stage and Hollywood Boulevard. That said, one of our family members was very tired after riding
Star Tours - The Adventure Continues, and decided to stay behind, as she had found a bench near Oasis Canteen. She later told us that she had a perfect view of the fireworks, and the accompanying music sounded beautiful.
Fantasmic! lasts approximately 30 minutes, and therefore I think you will have time to walk towards the better viewing locations. On the other hand, I may suggest the dessert party you're looking for:
Symphony in the Stars: A Galactic Spectacular Dessert Party. Note that it is a separate ticketed option and reservations are highly recommended.
Hope the hyperdrive motivator of your transport is in perfect working order, unless Star Tours is handling all of your travel needs. Buh Bye!
Ricardo.