Short Answer: No, you can’t, but you might see occasional glimpses of the show.
I also thought this would be lovely – to sit and dine and have a ground zero view of the fireworks safely behind glass. But, then I promptly forgot about the idea in the rush of planning and ended up accidentally inside the castle during some fireworks. That was when I realized why it doesn’t work.
First, there are a lot of roofs and balconies that somewhat would obscure your vision, as well as the stained glass.
Second, the views of the windows from the restaurant are mostly to the rear and side of the castle. Positioning-wise, this puts the fireworks above your head or in a blind-spot where there are no windows. This is the optimal viewing location for the rest of the park, using the castle as a centerpiece. CRT (Cinderella’s Royal Table) does not cover the entire upper story of the castle, but only a portion of it.
In addition to this, the lovely mood-lighting that is projected onto the castle can at times preclude even the glow from the fireworks outside the window. Most of the fireworks are too high in the sky to really affect the patrons of the palace, outside of the fact that you can hear the fireworks as gentle thunder – especially during the day. During nighttime shows, the music is piped inside the castle and the lights are dimmed.
Fireworks shows do change up regularly, so the positioning of the fireworks is going to vary, which means that at times you can see an occasional “firework bloom” during a nighttime show. However, you cannot watch the entire show from inside the castle.
However, the good news is that the precise positioning of the fireworks allows the entire park to view all or most of the show (depending on how many trees are around you).
However, don’t despair! The parks do offer reserved seating for fireworks with dining in the form of dessert packages. These cost about $80 per adult and $50 per child. You will have an all-you-can-eat dessert and snack buffet with beverages and a fantastic view of the fireworks.
Tomorrowland Terrace Fireworks Dessert Party
Plaza Garden Fireworks Dessert Party
Holiday parties are available also!
Hallowishes Fireworks Dessert Party at Tomorrowland Terrace
Hallowishes Fireworks Dessert Party Plaza Garden
Holiday Wishes Fireworks Tomorrowland Terrace
Holiday Wishes Fireworks Plaza Garden
In addition to this, several restaurants outside the park offer viewing of the fireworks, including Narcooses, California Grill, and Ohana.