I'm a former detailer. In the winter, I'll either wash our cars with 1 of 2 methods.
Method 1 - run the cars through a touchless wash. There's one about 4 minutes from me and they do $1 off Wed. They have 4 levels of wash, from $4 to $10. The $6 and $8 wash include include the underbody rinse and all 4 levels include bad air drying.
Method 2 - depending on how cold it is, same carwash has 3 coin op bays, I'll either run it through the $4 wash or spend $4 in quarters to get the salt off the car. Then I'll drive it home, pull in the garage and use a rinseless wash to do a final wash.
The method I chose depends on alot, especially in the winter. How much time do I have? If I have time, I'll do method 2. If the weather is horrible and too cold to comfortably work in the garage, I'll do 1.