I would really recommend the Western Water Park as well as it is fabulous!
Many brilliant rides and things to do.
The heat can be a bit intense over there as well so make sure you are sorted for suncreams and everything else before you go.
It was not too busy the last time we went- the food is excellent.
One ride I would recomment is the one where you climb up the mountainside and site in a big raft.. cant remember the name sorry.
You have never known fear until you go down the tube in that ring as it does feel like you are going to go up the side and out onto the mountainside!
And I fell from the step into the shallow pool getting into the ring as well which was hillarious for the people in the queue and the watching attendant.
Still, made people a little happier....