Best Waterparks in the North of England

[1willgetthere]

We have been to the Sandcastle in Blackpool and Water world in Stoke this summer, I'm look for another for October half term, any suggestions?

Or even better a holiday park with a water park, Similar to Butlins or Centre parks that you could recommend?

TIA

We like Calypso Cove in Barnsley, but it was very busy when we last went (August). Also Alpa Mare in Scarborough.

I don't know about holiday parks but I doubt there is much in that line in Barnsley!