I didn't actually see the spider, but the clearness of the turret leads me to believe it was in use.
There were a bunch of these around the shore of Scout Carson Lake, in may different color forms. At night, they crept up on the rock by our campsite, chilling out in the crevices.
I thought these were Gray Jays, but that was pretty clearly wrong. Saw these a couple times, almost always in small, noisy flocks.