[Soundgod]

Our dinners happen after parks close more often than not.
I do plan around fireworks. It does help that Illuminations is always at 9. The exception has always been that between Thanksgiving and Dec 30 it is 9:30. There is a new wrinkle this year. Fridays, which is the EMH night comes the fall, Epcot will close at 8 with Illuminations being performed at 8 followed by the EMH closing at 11 PM.
AK is never open that late and there is no evening entertainment.
If you know this much, you're already ahead of the game in planning.