Yes! We love watching the MK fireworks from the beach! You get a beautiful view of them from there, and if the wind is blowing in the right direction, you can even hear the music!
When you get to the marina, take a right on the sand and walk all the way down to where the grass starts (past the volleyball nets). We usually drag beach chairs with us. It's very dark down there and the fireworks are beautiful!
Warning - when you're down there in the dark, don't go near the water though because last time we heard an alligator!
When you check in, you will get a "program" of what's happening at the parks, including fireworks and parade times.