Why don't you guys try and set up a KH photoshoot or gathering at zenkaikon? Granted the scanticon doesn't offer much in terms of photoshoot space, but they do have a fair size parking lot, so there isn't a reason why you couldn't use a small section of the parking lot or an area outside to take pics. I would suggest King of Prussia mall, but they're not exactly next door, about a mile down the road. Which is walkable in about 20 minutes, given favorable weather.
In any case, even though Zenkaikon isn't exactly huge yet, it's never too early to try and put together a series gathering or something.