Winter car seat set up

Well here on the prairies the leaves are already falling so it has me thinking about how we will handle winter in her convertible car seat... her infant seat made it easy as we had that cover that was warm that went over the seat.

I should preface by saying if you don't know yet you shouldn't be putting baby or toddlers in their car seat with a winter jacket or snow suit on... so what is everyone's set up going to be for their car seat come winter? Blankets? Putting on and taking off the jacket? Car seat poncho?