The sidewalks are a couple of loops around both sides of the street. I'm like at the cross of an "8" residential street wise. So, I'm never all that far from the house. In addition, I usually request a tank of lawn mower gas from the occasional folk that offer to pay for the neighborly help -- livin' off the fat of the land!
As for warmth, when banging out many driveways, the physical work keeps the heat up. What's important, however, is to wear slick ski bibs and a Nylon shell jacket so the powdery snow does not stick to cloth, melt, and make your outfit into a cold, wet, and frozen crusty coating. A two-wrap scarf and ski goggles keeps the neck and face from suffering blowing and fly-back snow.