Sounds like a good trip you got planned, FlyInBack. I was at Cedar Point last year on the 4th. It was somehwhat crowded, but not horrible. Although, I don't know too well since most of my day was spent waiting in line for TTD to open up which took a while that day

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The fireworks/lazer show was great on the 4th, very moving if you're patriotic like myself. I love the song "Proud to be an American", when I've been at sporting events that have played that, it always gets me. It's even better when they have very patriotic images on the screen to go along with the music. Everything about the fireworks/lazer show was amazing.