I've eaten at CRT for dinner a couple of times, and it's a wonderful way to end the day!
When you check in downstairs, be sure to ask for a window table, otherwise they will seat you at the first available. If you ask, they may let you wait a few extra minutes for the window - and it is worth it.
You should know, though, that you can't "see" the fireworks in the traditional way because you're literally in the middle of them! You'll see many of them launch and be surrounded by tons of light of different colors. It is awesome but if you are a real fireworks buff, it may be a bit disappointing in that way. It's kind of like having VIP access to watch someone set off a fireworks show, but you have to stay under a tent since you can't look directly up. Sorry, I'm not sure how to explain this better!
There is one thing that is MOST magical for me - I've gotten to do it a few times now (I am FAMOUS for being the last guest out a park!) is that if you take one of the latest seatings, you'll have the fireworks during your dinner. Unless it's an EMH day, most people will leave the park while you're having dessert and coffee. That means when you exit the castle, the park is quiet - just you and your FH, with the music and the lights down Main Street. It's absolutely magical, like the Magic Kingdom belongs just to you for a few precious minutes. Security will follow at a distance to make sure you walk down Main Street and exit, but they usually stay back enough to create the illusion of privacy. These are truly some of my very favorite Disney memories - walking down Main Street like the Kingdom was open just for us... it's a special thing!
Good luck with getting your reservation - and don't give up if you can't get it on the first try. Things open up at CRT even at the last minute, so just keep calling!
Jennifer
Counting the days 'til my Disney wedding on 12/11/06!
