The Ettiquette Board is full of great possitive women. They were really clear and thoughtul with their suggestions/opinions. And no, the conlusion wasn't that the kids room was absurd, a few of them are doing it and others have seen it work out beaufitully.
They helped me come to the conclusion to just univite the families that cause problems. The problem causing types would bring their kids into the reception anyway even if it was clear that it was an ADULT only weekend. Why risk it?:-) My mom totally agrees (she apprently personally isn't fond of them). Now we can use that space (Originally a game/lounge room) as a great post-reception party spot for those who plan to continue the party deep into the night.