My family went (wife, daughter who was 4 and son who was 2) and all of us thought it was amazing. We did a package dinner thing and didn't have to wait long and got good seats, so the dinner can be worth it if you are going to be eating in the park anyway. We will definitely go again on our next trip. We sat somewhat close to the front, and had our raingear on as people said we would likely get splashed. For whatever reason (perhaps because the dinner package seating is off to one side) we didn't get very wet, and we were only a few rows back (I'd guess four or five, but don't remember exactly).
Art