Whenever I have shot events such as this, I am Mr. Fumblefingers. A basket of nerves. Or sloppy, negligent, or... something. No matter how you think through the upcoming event, it never works out that way. Walking in there mixing cameras is a recipe for disaster. Have you ever fouled up a wedding and had NOTHING to show the customer? I have--once. Never again. That was 1984. I never forgot it. You would do very well to pick your MF main camera, and a 35 MAYBE around your neck for those quickie candids. If you traipse in there as a walking camera store because you enjoy owning these gadgets, you will be very sorry.