Generally there is some form of pre buffet while the photographer is doing his thing right after the ceremony. As appetizers are usually priced by the piece and you would expect a guest to eat 5 or 6 per half hour, your photographer could be costing you more than just photographs!

Ask if you can schedule some shots before the ceremony, ones that only require just one side of the family and just the bride or just the groom. This can cut down on the cost of the pre buffet and also get the party going that much quicker!