The Cheshire County Council has an excellent website that will allow you to access old maps and aerial photo's.
If you click on the link it should show you a 1970's photo of the area and if you zoom in the outline of the former camp stands out quite clearly with the Married Quarters on the South East perimeter
http://maps.cheshire.gov.uk/tithemap...west+kirby!x.0
If you google RAF West Kirby Association you will find all manner of information that might just include the clues that you need.
Good Luck.