I'll add in, if ME< I would do a good once over on whole sled, as kinda of the point of summerizing is making sure all is good for the next season and IF anything is found, to repair/replace before snow falls, saving you down time!
so, I'b check bearings on all things, and also change the chain case fluid! and do a basic summerizing NOW, as for fuel, if non ethanol, I would just run it, or as others suggested, drian out what you can and use in a vehicle and add fresh NON ethanol
and add a battery maintainer to this sled , in today day and age, I think every battery on any thing that sits more than a few weeks, Needs one, that or disconnect it, as modern vehicles ALL suck power when parked like never before!