Speaking as an aviation enthusiast/photographer try to get your plane(s) parked so the punters get a photo opportunity without the need to wander off. If possible have your photographer look over the apron and propose a plan for parking and passenger changeover. For me there is nothing more annoying than trying to get a photo of the plane I have just flown in but the pilot is there with a cover open or dealing with re-fuelling. The ideal solution to this is to allow the pilot some time alone for these checks.