You need the same thing one needs for winter and snow some key components/items are;
Shovel to dig shelter and dig out machine.
Ax or hatchet
tow straps
fire making
water gathering (cookpot and stove/fire; lots of snow to melt)
Extra clothes
shelter
signaling (mirror, whistle, fire, flares)
1st aid
Extra food to help keep warm
tools and spare parts for machine
Ice rescue equipment
This is just a start...
Bill