The cottage party, being a closed venue need not be notified. However, we will have to make sure that we do notify for various activities that may involve more than 9 people - swimming, walking, climbing, etc. as those will take place in venues that are arguably public. How many notifications we should generate is difficult to determine. One for each separate activity, each time it occurs seems sufficiently annoying, I mean, prudent, but there are inherent difficulties with scheduling using that approach. Perhaps we should also contemplate blanket notifications for the entire time of potential gatherings. Not yet having read the legislation or regs, I am wondering whether tweeting individual members of the relevant police force is necessary, in addition to letters and faxs. Perhaps all of the above, just to be safe.