After reading the latest posts I thought you might like to see Bruce's (kiwi's) entries on the "ice in & out" dates since 2007.

Ice out May 2nd, 2007.
Ice in Nov 21st 2007 - Ice Out May 17th 2008
Ice in Nov 29th 2008 - Ice Out May 5th 2009
Ice in Nov 28th 2009 - Ice Out April 20th 2010
Ice in Nov 23rd 2010 - Ice Out May 11th 2011
Initial Ice in Nov 19th, partially blown out Nov 22nd
Ice reset in main lake Nov 23rd 2011- Ice out May 2nd 2012.
Bruce's last entry May 2nd.

Ice in early Dec. 2012 - Ice out April 27 2013
Ice in Nov 20 2013 - Ice Out