I've been hired to shoot a small wedding (about twenty people) in May. This will be my first one--I'm both excited and nervous. They've seen the small amount of people photography that I've done and decided to take a chance on me even though I haven't done any other weddings. I don't have any equipment other than my tripod and a Canon PowerShot SX100 IS (point-and-shoot/SLR hybrid). There will be a church ceremony and the reception will be held at a restaurant. Any advice from you pros?