Yes, the pictures remind me of the Boardwalk at Hershey Park, which is a similar set up and seems to be comparable in size, from what I can tell. When at Hershey, the Boardwalk is a fun place to spend a couple hours and break up the day.
I am looking forward to hearing what people thought - we will probably make the decision to upgrade our tickets or not when we get there. Since we are renting a car, I will just bring all "swimstuff" just in case!