TTN. I had a similar experience a couple of months ago. I saw the man at the gate and pointed out that I wouldn't be more than about 50 yards from him, and in sight at all times. No luck. A couple of weeks later I went again, at a weekend. No problem. In fact, once I produced my logbook, showing I had flown the type, we got into conversation, and he accompanied me while I got what I wanted. Depends who is on duty I guess, plus the fact that during the week SHQ is pretty close, and who knows the eyes that might see?