On our first family trip in July of '01, we flew into MCO on the night of the 4th. Our first Park day wasn't until the 6th, so the crowds weren't too bad.
Anyway, flying from Austin, you fly out over the Gulf of Mexico. It was already late evening when we started our descent and approached Florida's west coast. Fireworks were goin' off everywhere around us as we descended further. The approach was close enough (and at the right time) to WDW that we got to see some of their fireworks too. It was very cool...!