I carry a torch kit with me but have no idea if its against company policy. What they don't know wont hurt them.
Lots of food and drinks and warm clothes.
I also carry some tow chains with me in case someone needs help and I'm able to help.
For the sake of newbies, soccer moms w/ minivan full of kids, or for any reason there is a white knuckle driver trying to find safety... Know your wake, meaning the snow/slush you will punish these slow movers with while passing. Get it moving, and make the pass as quickly as possible.
I've seen too many 4whlrs get beside me, and I know they've been blinded, but continue to pass slowly. <---Yes they are idiots, but they are also human as well, and born to make mistakes. When completed pass they will slow because they know they have tested their own skills, and had a God moment.
And now you must pass this 25mph driver that insisted on passing you at 45mph. Breath deep and forgive them, and pass quickly as possible. That should go for every pass in foul weather, and it would also behove the slower driver to reduce speed as needed.
There should be a law against trying to pass you twice if they regain their bravery!