I know it's not near that time yet, but I'm curious as to what everybody does to get their boat ready for winter storage? I usually change the lower end oil in the main outboard and hang it straight (instead of upright on the motor toter). I take the kicker motor inside after running it dry of gas. Both motors get a shot of stabilzer into the cylinders. I used to take the three batteries out of the boat and inside - but that was a hassle. I bought a 3 bank on-board charger/maintainer this spring; hopefully It will work the way I want it to for this winter. All I'm going to do there is plug the charger in and let the maintenance mode keep the batteries charged (warm) through the winter.
I blow the livewell lines out with compressed air, and take the plug out. My ride sits outside under a cover during the warm months, and I add a tarp over it for winter to help with the snow.