tropez - just a FYI - it's doubtful that you will find any available space in May at this late date.
Secondly the yahoo groups are mostly just for social contact making, please use the Desire Events and Groups section to find specific groups going in each month
http://desireresorts.19.forumer.com/viewtopic.php?t=322In June you will find at least 5 groups going that month and if you click on a group of interest for your time frame, it will provide a link for further info and how to book with that group