I was out for a walk about yesterday afternoon towards sunset, and I espied with my little eye these fellows hunkered in the pine straw.
It's been seasonably cold lately, and it'll only get worse, leaving me to wonder hos a fungus can pull it off in such weather.
My only guess is that the road is built up, and this west facing side drops off about 30 feet. Perhaps the side exposed so directly to the setting sun gets and stays a little warmer than the surrounding area.
Mind you, I do not anticipate testing that hypothesis with a camping trip.