First - Congrats on Getting 'er Done !
I do feel for y'all driving in that frigid cold.I'd far rather sweat to death than freeze to death.
I ride in cold weather and in the wind.Don't get cold though.
Y'all ought to check out heated gear,plugs right into a cigarette lighter socket.Gloves,jacket liner,pants liner and insoles will run about 15 amps on high.
I have a dual control thermstat.One controls the upper half,the other the lower half.Never get too hot or cool.
Stay warm and you don't wear 1/3 of the gear you do now.
Liners
http://gerbing.com/Products/liners.php
temperature controls
http://gerbing.com/Products/tempControls.html
heated insoles
http://gerbing.com/Products/insoles.html
Gloves
http://gerbing.com/Products/gloves.html