I've shot weddings before, but being in Minnesota they almost always have an indoor venue available due to the long cold winters that we have. I am coming up on a wedding that I will likely be shooting outdoors and in the rain. I'm not as worried about my equipment, I am more concerned with how to capture the shots that I need such as b&g alone, the wedding party, family posed portraits, etc while potentially being stuck in poor weather.
Should I come prepared with 10 umbrellas? Should I make all possible attempts to find a sheltered area for the posed portraits? Do I have an assistant hold an umbrella out of the frame to protect the b&g during alone shots? Just some ideas I've had, but I've never actually shot an outdoor ceremony during the rain.