I'm a newbie, but here is what I have learned while frantically planning my family's vaca. The Fantasmic package is available on the WDW website and you can pick from three different restaurants to dine in before the show. From what I can gather this is a dinner show with fireworks or some kind of electrical imaging.
Since your hubby likes fireworks it might be worth checking out. There are a few other packages, but I can't remember them...
(Disney brain overload). Sorry if that wasn't much help, just thought you might to check into Fantasmic since many rave about it.
Oh goodness. I think you've been a bit misinformed.
I've never done the dinner package, but I do know that it's not a show DURING dinner. Fantasmic! (F!) is an evening "spectacular" (more a show than fireworks) that is presented many nights at DHS. What the dinner package does is allows you to eat dinner at your selected restaurant, and then wander over to the venue for F! You will get to sit in a reserved seating section, without arriving as early as you would need to if you did not do the dinner package. If I recall correctly, at a certain time -- 30 minutes before showtime? The reserved section becomes available to anyone, so you still need to arrive somewhat early.
The only fireworks at DHS are on special holidays -- 4th of July, New Years Eve.
The Magic Kingdom offers "Wishes" every night of available operation. There are alternate versions -- "Hallowishes" and "Holiday Wishes" -- which take place during the parties, and Holiday Wishes runs the end of December, party or not. Like DHS, they have "special" fireworks shows on certain holidays -- but they usually run them the night BEFORE the holiday as well. (EX: July 4, they offer "A Salute to America"-style fireworks -- I can't recall the exact name, so I stole from Sam Eagle, lol -- but it does a "dress rehearsal" on July 3 as well as running on July 4. NYE is the same way; I'm not sure about other holidays.)
The easiest way to dine and see the fireworks is, as previous posters have said, to invest in the dessert party. It's a bit pricy, and not on the dining plan, so look up reviews before you invest. For my group, it is perfect -- I can't handle the sit-and-wait-in-crowd thing so we usually watch fireworks from Fantasyland. The dessert party lets us see the fireworks from the front of the castle. (ETA: The dessert party, unlike all other dining events, is not released at 180 days. It's released two-ish months out... check the dessert party watch thread for details.
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You can also see the fireworks somewhat from 'Ohana; a popular strategy is to eat at 'Ohana and then go down to the beach at the Polynesian for a great view of the show. California Grill (I believe) has a viewing deck you can watch the fireworks from. It's one of the signatures at the monorail resorts -- I'm sure someone will correct me if that's not it! I believe you could also see the fireworks from the Plaza if you were in the right seats and it were open when the fireworks went off -- which it usually is not.
Animal Kingdom has no nighttime entertainment.
Illuminations is at 9 at EPCOT, and has fireworks within the show, low on the water. The only dining I can recall is people being seated on the outdoor patio at Rose & Crown (UK) although there may be others -- I think Mexico has an outdoor eatery as well. You can enjoy Illuminations from anywhere around the World Showcase lagoon.
Schedules are released slightly more than 180 days out, and although park hours might change, the timing of events usually does not. (The 'special' fireworks are often not on the schedule, they get added later.)
I think that's a fairly comprehensive overview -- too much time on the board here, clearly! -- but if I've missed anything or misspoken, I'm sure someone will be along to correct me shortly.
