Wind whooshed through the pines and spruces who bristled across the spine of our rocky point like quills on a porcupine. I snuggled more deeply into my sleeping bag. The day had been gusty, our paddling fierce and steady against whitecaps, with white lines of foam streaming down the lakes. Once the sun rose again, we’d be paddling upwind into a three-and-a-half mile fetch. Would the breeze slacken or strengthen overnight? I tensed at each gust and relaxed in the quiet, trying to foretell the future.  You would think that after 25 years of paddling in the Boundary Waters Canoe Area Wilderness, I’d be pretty good at sleeping in a tent up there. But no, I often find myself listening in the dark.