I know it’s a bit late now and it doesn't matter but I would recommend Stainforth, near Settle. It’s not too far away and there is plenty of space. The toilet facilities are superb and there is also a children’s playing area with climbing frames and the like. You can also visit the local pub which is about a 15 minute walk into the village of Stainforth it’s self and they are child friendly.
I would recommend that you also give them a ring and book your self in as they do get very busy this time of year.
http://www.stilwell.co.uk/show_town....mps%7CL4291677
http://www.accringtonweb.com/gallery....php?file=1405