Any place that stocks salmon should be a good bet, check the state stocking site. I have been told that they swim close to the ice, so unweighted shiners are a good bet and jigging also.
It seems that most places that have lakers in Mass. are not accessible during the ice season. Might have a better luck in NH for them. Nubanusit in Hancock had a monster come out a few years ago...don't know what the ice fishing regs are there though.
http://www.winnipesaukee.com/forums/showthread.php?p=89690