We've had hit or miss experiences with the 10:30 PM showing. There's been times when it's been fairly empty and we've been able to walk onto a good spot 5 minutes before, but other times when it's still really crowded. @sazzle12 it may also depend on how familiar you are with the layout of Rivers of America and F! - if you are fairly comfortable with navigating the area in the dark and with crowds you'll likely be OK if you're in the area after fireworks, but if you're not it's always safer booking a dining package if the budget isn't a concern.You can usually walk into a decent spot to view the show at 10:30pm.