Mon, Jan 2 2012, 8:46PM
Callow Top has an outdoor pool. I didn't like the site much (the phrase battery hens came to mind), but others love it. There was a site in Fenny Bently called Highfields farm that had a small indoor pool. Haven't been for years but I think that it has changed its name. If you don't want to limit yourself to the Peak District, there is a site in Woodhall Spa in Lincolnshire with an indoor pool, a games room, a bar and some entertainment. Can't promise it is cheaper than Sandy Balls though.
mel