This beautiful neighborhood is great for exploring between the ceremony and reception. It's right next to the church and very walkable if it's a beautiful day. Gelato Gilberto is a great place to stop for a sweet treat. They also have numerous restaurants and parks.
Joel proposed to me on the river many moons ago. This is a great spot to explore and enjoy what Louisville has to offer. If you are staying at the Sheraton you should be able to walk to the bridge from the Indiana side.