Last year at exactly this time me and my pal slid off in snowstorms around Mohnesee. Somewhere up in the hills (maybe Langschied). The Africa Twin did remarkably well. He slid off on his Tracer and I rode back to help him. I dismounted and whilst stood still the wheels of the AT slid away.
We came over again a couple of weeks ago and rode the Sauerland but the weather was lovely this time.
Enjoy your trip Della.