All good advice, especially about not remaining aboard.
The only thing I'd add is that, if at all possible, have your boat hauled out. Many insurance policies will now pay some or all of the haul-out costs, since the claim files show that boats on the hard make far fewer and less costly claims. Conversely, boats in slips have the highest claim/damage rate.
Even if you haul, you still have to strip the boat, though. Experienced marinas won't haul a boat out until it has been stripped.
One of the biggest problems diligent owners face is damage caused by absentee owners who fail to prep their boats. Unfortunately there's not much you can do about that (except, maybe, set them adrift? - just kidding) That's another reason hauling looks better and better, especially if it's at a marina that enforces the must-be-stripped-before-hauled rule.