I havn't been since the 4th grade. All I remember doing beside seeing the falls was playing in the hotel pool....and that's probably not what your thinking right? Sounds like fun though! Have a great time!
I've been there twice, both times on the Canadian side, and I love getting up during the night & hearing & watching them. And the moon will still be pretty full, so you will be able to see the falls even after the colored lights get turned off. Happy Anniversary, by the way!!