supports the hull
better than stands. Lots of people leave their boats in. I wouldn't remove the batteries though. What's going to run the bilge
pumps? Also consider that if you're in open water
, ice flows may put extra strain on the mooring
; make sure it's 100% reliable. Smaller coves with slower currents can freeze over altogether.
Another option would be a marina with shore power
to keep the batteries charged. Slips are very cheap
in winter, compared to summer. Just find one with flowing water so you don't have to worry about de-icers.