There is a complete sub-section of Chief Delphi devoted to Off-Seasons at
http://www.chiefdelphi.com/forums/forumdisplay.php?f=20 - please check there for the information you are looking for.
(NEMO publishes a calendar of off-season events, workshops and summer camps at www.firstnemo.org/calendar.htm which is kept up to date as much as we are able!)