Yes, don't need a lot of space for water parks, especially without a parking lot. Heck, Universal Singapore entire Theme Park is only 60 some acres, but it has a lot of well themed attractions & a lake. If they skip a huge wave pool, that would be plenty of space for a state of the art themed water park. Great idea to keep people on site, especially with the family oriented hotels (Cabana, Cabana Towers? & Royal Pacific very close by (walking distance).