I love this idea and think you could make it happen w/out any additional club volunteers. We had a great photographer at Go Topless Day (here are a few of his photos
http://photos.allthingsjeep.com/gallery/8168561_9UpYv#536767564_8cbkihttp://photos.allthingsjeep.com/gallery/8168561_9UpYv#536769906_9XebHhttp://photos.allthingsjeep.com/gallery/8168561_9UpYv#536768646_mb8NVI bet he'd do it for a nominal fee and if you had the photos taken before the Jeeps got to the gate, with a GAJR banner behind them, with the date, etc. people would want them. The photographer loads them up to the site where people can buy them, and GAJR gets a cut of the sales. Maybe he'd even be able to print them out there.
Even if it wasn't a money maker, if it did not require any additional work by any of the volunteers (other than to hang a banner in a good spot) it would be just one more fabulous activity/event the attendees get to participate in. How many people have a really good photo of themselves in their Jeep? I think if it was a great photographer, it would be just one more thing people love about the GAJR.