The snow is supposed to hit us here in Seattle this weekend. You betcha that I have to do my own repairs in the snow. The Girl's car won't fit her walker and my bike, and it's highly unlikely that she's going anywhere when the roads are covered.

Princeton Tec Quad on my helmet so I can see what I'm doing along the streetlight-less stretches of my commute.
Section of Tyvek housewrap to use as a work mat in the snow. (folds down to almost nothing, weight is insignificant.)
If I'm wearing big gloves, then I keep a pair of shooter's gloves in my bag for repairs (the gloves with the flip-top fingers).