It is crazy, I know, but we have seen people camped out in and around the castle hub a good 90 minutes before fireworks start. So apparently that is the best spot to see everything - but really, you can walk up 5 minutes before and still get a good view from just about anywhere on Main Street (provided you are not standing behind my 6'4" husband!). We like to stand in the hub closer to the entrance - it's a great view, a little less crowded, and you can escape quickly when the show is over (if that is your plan).