Have a look around, look at their website, and their FB page and see what a typical family session of theirs looks like. Choose someone whose style of photos you love!! Decide what you're willing to pay and then find someone in that price range. You kind of get what you pay for though, don't get someone who will give you 100 photos on a disc for $50, lol.

Where do you live and I might be able to recommend someone??