First off, i would say yes you need to feed the photographer. they are going to be there during your ceremony and reception and depending on how long the party goes may get really hungry. Now i'm going to ask you a question, are you using a caterer? because if you are, sometimes they will prepare smaller plates for these people (musicians, djs, photographers) and charge you a smaller price. But you should definately feed those who are helping to make your day special. (sorry if this isn't exactly what you wanted to hear, but what were you expecting?)