ASU: How would you feel about just Kings Island sometime in August? There I'm more up for the waterpark, since I'm much more familiar with the rollercoasters.
Kings Island would also be more doable for GG and CinnamonGirl, I think.
GG: You will have to let me know if you're available at all for whatever weekend we choose, because I can always come and steal you since my parents are about 15 minutes from you.