I know the is unorthodox, but we are planning a destination wedding at castle/villa in Italy. It will actually be a wedding weekend where everyone will stay on the property with us for 3 nights with events each day. Our friends and family are mostly big travelers and we have of course already talked to our closest people and got their sign off. However, we need a somewhat (within say 4 or 5 people) count of attendees before we book a location. The place we like best only can accommodate around 35 people and we have around 50-55 on our invite list. We think based on knowing who we are inviting that we will end up with about 32, but we can't take the risk of having 40 and place for people to sleep! Does any one have a digital save the date recommendation where we could include lots of details and then people could respond with their intention of coming or not? Like I said, I know its unusual, but under the circumstances I think people will understand. We are giving people 21 months to save for flights etc. since it is a big trip and will likely be their vacation too, but we need to know if they plan on coming rather soon as the place we like books up well in advance. I want something classier than an email. Ideas?