My boat is on a cradle and shrink wrapped near Lake Michigan and my winter storage practices are similar to most of the others, with a few twists that work for me.
I stand all my cushions on edge in the v-berth and keep them separated for air circulation by putting the pfd’s over the top edges of the cushions like saddles. This frees up the main saloon to function a bit like a workshop in the spring with tools, supplies, shop vac, etc. out on the bare sitees and readily accessed. Batteries stay in place, fully charged and completely disconnected.
Condensation is the enemy. Natural air circulation and humidity reduction are critical. I leave all the seacocks open, to drain and for air flow through the sink drains, and I open the head port lite an inch or so after the shrink wrap goes on. I use about eight Damp-Rid buckets in the cabin and find that they take a lot of moisture out of the air in the autumn and spring months when temps and humidity fluctuate, but not much during the cold winter months when the air is dry. I also empty the contents of all lockers and leave the doors open, propped if necessary, to facilitate air flow. Foul weather gear comes out of the hanging locker and hangs on the overhead hand rails.
