Is there any fee for using the water park ?

If staying there no you get four passes a day included in stay. If you are not staying at the property its 23 per person but there is a groupon available for cheaper

Yes it's $32 a night if your booking a room for some nights

It's included in the room charge. You get a new wrist band everyday.

I dont remember exactly. maybe $22 per day per room. But my kids love this place