Montessori- yes DU will help you with ressies for this. They don't guarantee they can get them though. Our experience was 6 adults trying from home on the first morning we could. None of us got ressies. We were a large party(12) and knew it would be difficult but figured we would try every morning. Later that day I got an e-mail from our agent- DU was able to get us ressies that morning! We had a great time and I hope we will be able to do it again in 2 years when we go back.