Wow, that is going to be an awesome wedding! My wife did a semester abroad in Dijon, France. When I visited her we went to the Loire valley Chateau's. They are absolutely amazing. Can my wife and I go ahead and RSVP? lol. Since it is a special situation I don't think it is unreasonable to ask for a yes/no, maybe give them a few weeks to talk it out and Miranda had a good thought with the cushion. Best of luck planning, and I can't wait to see pictures!