I pretty much ditch 2BM washes in the extreme cold. However, I have my own method of washing at the coin-op each I feel is just as good.
1. Stick in $5.00 and rinse vehicle well with their pressure hose for about 15 mins. This gets off 90% of the dirt. While I'm doing this I fill up a bucket with their water
2. Clean wheels with Montana Boars Hair Brush and Daytona brush using wheel cleaner. Rinse brushes in bucket I just filled after each wheel. Hit fender wells and running boards with APC or Grime Reaper and a fender wells brush. Stick in $2.00 and rinse wheels and fender wells. Tires are coated with Tuff Shine, so the just get brushed down with the wheels.
3. Get 2 Gallons of distilled water I bought on the way there at a pharmacy and fill up a small bucket to do a rinseless Gary Dean Wash. I use a bunch of waterless wash to soak each panel as I'm going along. Usually I use about a 32 oz bottle of WW for each wash. I bring lots of towels.
4. Spray wax each section after I dry it. Once a month I paste wax the vehicle. That's what I did today. If I'm paste waxing, I use their spray soap as as well initially.
I bring a lot of stuff there, including a Werner Work Platform. Luckily, I have a coin-op place where one of the bay doors close, so you are isolated from wind. I can stay there in the bay several hours and nobody bothers me. I used to drag 5 gallon buckets, a dolly, and grit guards their. Gave up on that and started with GDWM. Saves so much time. If you don't know, that's when you use a fresh towel each time and never dip a used towel back in your rinseless wash solution. It really saves a ton of time. Much easier to wash a lot if towels at home than to stand there and rinse and ring out towels outside in the cold.
When its cold and you hand wash a car, people just think you are just too crazy to bother with.