In North Dakota we learned that carrying candles in the car was part of emergency plan - a single candle (and matches/lighter of course) can heat the car interior enough to make the difference between life and death
thermal blankets, GPS and charged (manually chargeable) cellphone and emergency radio also good items
That and Pasta.
One year KV and I had to travel, no room in the Inn and he had just been released from ICU for treatment.
So we traveled with chains on, pasta, suited him up in a snow suit (he is WC Bound and to big for a one person transfer) and all the other e merg stuff.
The highway from the Hosp to our home on the coast was closed but we had no choice.
One Doctor gave me his private phone number and said he too had patients to see the next day over here to give him a call if we make it. I call that my Canary in the Coal Mine story.
We were the ONLY souls going over the coastal range and just as we got here the trees had been cleared from the highway that fell from the worst ice storm in written history so we were able to take a back road from there and made it home.
Thanking God for our safety.