We were in MK on July 4th three years ago. It was wonderful! The fireworks over the castle and all over the park were unforgettable! It was a 360 - no one knew where to look, so we just looked everywhere!
Yes, MK was crowded. Yes, we were exhausted from spending all day at the park. Yes, we had one of the most memorable times of our lives! We will do this again some day soon. (We're in a Drum & Bugle Corps, and it's hard to break away on July 4th. Guilt!)
If you have a chance - see the fireworks in MK on the 4th. You will never forget the experience!