Hi Julie!
Although PhotoPass photographers seem to be every 10 feet in the theme parks, they are not available at character meals. Each meal does begin with a professional photograph available for purchase (included with Cinderella's Royal Table), but other than that, it is up to you to capture that award-winning photo. I think this is primarily due to the fact that character dining photos are close up and you're not trying to position your subjects with one of the park icons in the background. In any event, even without a PhotoPass photographer, you have ample time when a character arrives to try to capture that great shot! With the advances in digital photography, I employ the "take 20 to get 1" philosophy, and just click like mad. You're bound to get at least a few keepers! :)