I am not sure whether this is too late for your weekend shoot but here is my take on it. I like to look at the most important values in a scene. In this case you want to be sure you get texture in the white of the church. So, meter the white where you want to get texture and open up two stops from that reading. If you want to make sure you also get shadow detail you can meter the difference between the highlight and shadow as the sun goes down and make the exposure when you have about a 4 stop difference. This is a bit backward from normal Zone system approach but should give you what you want in the image.