We're going through the same thing! We thought we had about 45 people who were FOR SURE coming. But when we sent out the information for the group booking, (a pretty good rate too), and many people say they want to try to get a last minute booking or just can't afford it right now, etc... although I think these people will end up paying whatever price they find at the last minute just because they really want to come.
Hang in there, hopefully more people will book soon! November is not that far away!