Is the water park open ?

Seasonally

Yes, it is open.

Same here, over the weekend, majority park is open, only bad thing is the hours are shorter. Buy tickets on line from their website and reserve day or days your going

Yes it is you don't have to where you're mask

Yes. Most of it is open. I was there over the weekend and the water coaster was out of service and some of the slides were closed off but most everything is open. :)