When we cast off about four years ago, we yearned to get away — away from the urgent, crowded metropolis where we’d built our lives. The cruising life promised things no large city could offer. We couldn’t wait to see the shadow of our boat on the bottoms of remote, magazine-cover anchorages. By day, our kids would jump off the toerail into warm, inviting water, and by night, under clear, pitch-black skies, we’d show them the constellations. We’d kayak ashore, walk long beaches and savor sundowners in the cockpit. This was the stuff of our cruising dreams, and all of it eventually came to pass. But looking back, I find it interesting that not once, not for a minute, did I anticipate the allure we would find in something so…