I was there last weekend, and I must say, after seeing the flooding first hand, and also in the pictures, it's a miracle that the park was open Sunday. It was my first trip to the area and was anxious to get to the park Sunday morning to see if they would be open. All rides were running, and the park looked great! They cleaned up the debris, layed down new mulch in flowered areas, and trimmed broken bushes. A simply amazing job by the staff made for a great day!
Those pictures are amazing, especially since I was at the park too on Sunday with friends. You would never know that the water had been that high just hours before.
Like the other posters mentioned, all the rides along the creek were operating on Sunday. All that was closed were the concessions and games in Comet Hollow and around the Trailblazer. (No Pit Beef, darn it) I guess it wouldn't be much fun playing Whack-a-soggy-mole.
The only down part was that it was eerily dark in those areas once the sun set without the lights from the closed stands. We were also hoping they might be a bit lenient with the 8:00 closing time, since they had been closed the day before. But at 8 sharp, all the ride lines were either chained off or had an employee stationed there. Oh well, only 4 weeks till Hersheypark in the Dark.