The Magic of Disney | Orlando, FL
There are several vantage points for you to consider watching the evening fireworks from. If you decide to watch them from "up close" I recommend getting a spot on main street about half way between the end of the buildings and the "Partnership" statue.
That is where this image was from. Here you will be using a mid-range zoom.
The alternative, is to post an image from the other side of the ferry boat (on the landing). This has two advantages - first, you don't have to fight the crowds at all getting out of there. Second, the fireworks look a little different and appear "higher" over the castle. It's just a matter of preference.
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