I made ADRs online 180 days out, then a couple of months ago we added a day to our vacation. I was able to book California Grill for an early dinner, but we really wanted to arrive around 7:30 or so, have a leisurely dinner, watch evening fall, and then see the fireworks from the 15th floor. Persistence paid off. I just got a 7:40 ADR (and cancelled the 5:45, of course). The Magic Kingdom was our honeymoon destination but we have never seen the Magic Kingdom fireworks. I'm so excited!