Our daughter and husband did wear their wedding clothes since we had Randy come back and take pictures for the event. They just picked up the kids at the hotel in Sedans and drove them to/from Epcot. They entered
somewhere between Canada and UK.
Everyone else dressed casual in park clothes and met at the location.
We requested only the choc fondue, beer, wine, soft drinks and bottled water. They usually add the fondue as an extra add-on to a desert display but I got them to agree to only fondue as long as I would pay no at least
50 guests. At the end, our bill for the whole event was approx $1500 for 45 guests.
When dealing with them be very specific or they will add many misc items to your bill. The more add-ons the better however the event can be just as nice without things no one will notice!