Keld,
The temperatures in CT do get cold in November but a really hard freeze won't come until later. If you have access to dependable electric power, I'd run a couple of good quality portable electric heaters, one inside and one in the bay area. If you have built in electric heaters, all the better. In NW CT I did this for a few Novembers, waiting for Thanksgiving to head south. If reliable power is not available, do a full winterizing. Don't rely on a "partial" winterizing". Always better to be safe than sorry. Winterizing is cheap, plumbing repairs are not.