Any further winterizing tips?

Hope to get a couple more weeks out of the season, but getting ready for winterizing here in WI. Did some searching and came up with these various suggestions/tips. Am I missing anything? Doing anything I don't need to or doing it wrong? First time witnerizing a boat, 2002 X-star with 310 Predator
-change engine and transmission oil and filter
-top off fuel tank and add Stabil
-run engine up to temp, then suck up rv antifreeze from 5 gal pail using a hose and some fittings I made to connect to the water pump intake until I see the anti freeze coming out the exhaust.
-drain ballast lines and remove impellers from all three pumps and store inside house. Remove center ski locker sac and store inside house.
-get all the water out of bilge and ski locker
-dry boat out really well with fans.
-disconnect and remove battery. Keep charged by periodically charging over the winter.
-will store it inside an unheated garage with the cover on.