It is a wedding! Everyone is there to have a good time and be happy for the couple. The only person who is going to care about your stutter will be you. You will need to navigate the meal, I would advise that you say you jave a stutter so people understand what is going on. Half the time is music, dancing or milling around doing photos. If you are really worried about your name then write it on a sticker and put it on your jacket. People will think it is smart when you explain it is a bugger to say. I wouldn't sweat it. You might make a friend.