Keeping gains during the winter

[NeedAJoker]

I had this worry last year and ended up building a garage simulator and that helped a ton, but on top of that, you should see if any local instructors do a winter series.  My instructor does a package with 12 weekly lessons for pretty inexpensive, much less than a standard lesson outdoors during peak season.  Quick 30 minute lessons on his simulator, gave me the drills I needed for mirror/video work at home. 

Made a huge difference.

Good luck.