When it sarts to get cold the critters look for warm/sheltered spots to
winter over.

I would set traps (including glue traps) and poison. If your boat has
hidden places you might anticipate this and place a few feet on fiberglass
insulation batts. When you open your boat up again you will likely find
some dead mice inside.

"frank1492" wrote in message
...
Do mothballs work? The boat is stored outdoors and
covered with a tarp. Last year I had a very severe problem
(for the first time- very cold late winter in NE.)
I had also thought of D-Con but there are lots of
nooks and crannies where they can go to die rather
than leaving the premises! Your thoughts?
Thanks!
Frank.