I found out if you are tarping in -10 to -20 degree temps it takes twice as long for me to tarp because my hands get cold to the point of being unbaringly painful. I had spent almost 200 dollars in trying to find gloves or mittens that would have me stand at least an hour of working before I have to come in the truck to keep my hands warm. I might have to look online for some arctic gloves or something.
Not sure what your company's idling policy is, but I've found using two pairs at once speeds things up a bit. You use one pair, till it gets too cold/wet to continue using, then put it onto the dash or under the floor vent and take the other pair and repeat as necessary. Then, while you are using the new pair, the first one dries/warms up and it's one of the better feelings in the cold I've experienced.
The trucks idle for five minutes only and only idle over five minutes if the voltage drop below a certain point.
I bought 2 pair of these at the start of winter and only used the one pair not once has my hands got cold. Think they are Boss Snow Guard gloves.
Get some of those shake up chemical hand warmers. Tuck them in your gloves or pocket and warm your fingers when needed. I spend alot of time outdoors in the winter. I always have some of them with me.