I did find your PM and sent an email in return.
Porter's field was active in April 1945 as I know. Not sure if they kept it open after WW.2.
One of my friends is a local of Apeldoorn. I 'll ask him about the Austers near Apeldoorn.
Our VF608 was based at NAS Valkenburg when Group Captain Kerr used it between 1949 and 1951. This was of surprise to me as the main force of KLU Austers operated out of Ypenburg. Our Navy received Auster mk.3's long after Kerr had left.