Actually, the crowd was not too bad at all--I have seen MUCH worse. There were several school bands there and quite a few Moms, but no real crowding.
The longest lines I saw were for the Lost River, but even those weren't spilling over into the area by the Riverfront Playhouse.
It was hot, and maybe the new ride soaked up part of the crowd. Dunno, but it was really a pleasant day.