ESweig,
I live in Idaho, too. This is my first winter with my (new to me) '15 3500, which I purchased early last spring. While the previous owner included the winter front, I have not put it on. Instead, I thought I'd try what I used for the 17 years that I owned my '98 2500: a roughly 2 foot by 2 foot piece of cardboard with an 8 inch hole cut in the center to supply air to the fan clutch; the cardboard is slipped down just ahead of the radiator. On my '98 it was between the radiator and the intercooler. On this truck it still blocks most of the air going through the radiator but lets it flow over the other heat exchangers and the intercooler. I'll leave it there until temps start getting up around 50 degrees regularly. It only takes a minute to pull that "heavy duty" plastic cooling cowl back (I have a variation of the Geno's quick release pins for that and the grill) and slip the cardboard in or out. And it's cheap and easy to modify and you don't see it. Surprisingly it lasts several seasons, and it's just a piece of cardboard.
Oh, and I haven't had a license plate on the front of my truck for 10 years and I've had 1 ticket for it. (Knock on wood!)
-JGK