Hi bill6525! Here's a post
I wrote concerning winter camping you may want to look at. To answer a couple specific questions I didn't cover:
Slides - we left them out during snowstorms and swept them after the snowstorms.
For high wind we used some ratcheting tie straps to help hold the slide topper down so it didn't flap. We used towels around the straps at the edges because they still flapped a little and I didn't want them to eat thru the topper material. The tie straps went around the whole slide (we used 3 or 4 linked together to do this).
Awnings - we didn't use the patio awning except on the days it rained and we wanted a somewhat protected area to change out of our ski gear. Ours retracts automatically in high wind, also in weather below freezing, so it is somewhat useless in winter.