Jeff,
I was not able to attend your event, but from all I have heard as a PFA member, it was very good, and you are to be congratulated. The original post was not against Sywell but the PFA, which in my opinion was not justified for the reasons given by other posts.
Subsequent posts re the security arrangements leave me puzzled, and I really would be delighted to have an understanding of the reasons for the initial comments in your own post.
Very many licenced airfields are not, at least as yet, taking this position. Some, eg Clacton and Sandown, have public footpaths across the middle of the runway, with no legal possibility of restricting public access 'airside'.
My own home base has much more business and international traffic than Sywell will ever have, with an occasional bisjet, and many turbo prop movements. A successful air taxi service with navajos and senecas is based here, as well as a busy flight school.
Yet there is no attempt at secure airside fencing, quite apart from having unfenced public footpaths about 50 yards from both ends of the runway.
There is no 'hi-vis' vest rule, as it cannot aid security (anyone can buy them at a builders merchant) nor safety in daylight.
Please, please, explain the justification for the restrictions at Sywell - surely its not just a 'jobsworth' attitude?