RE: What do the ARF guys do in winter?
If I lived in snow country I would fly on skis. Look at YT videos of guys in Finland and Sweden, etc. They do not let winter curb their flying.
Here in SoCal, the summer is the off season for me. 100°F+ days suck, and by 9AM gotta pack up and go back indoors. That's when I do my building/modifying/repairing.