This 12-day itinerary encompasses much of the best of Brittany. It includes more hotels than I might otherwise recommend for a single vacation, but the pace is leisurely and the drives are scenic. (For an extended routing, the Sofitel Quiberon Thalassa Sea & Spa on the Quiberon Peninsula and Castel Clara on the unspoiled island of Belle-Ile-en-Mer can be combined with the Château de Locguénolé.)