Texas has hill country? Who knew? Well, the Lonely Planet guide to Texas, which calls the Hill Country "rightfully one of the state's biggest tourist draws . . . an area of gently rolling hills and valleys freckled with cacti and cattle ranches, lined with rivers and dotted with peaceful, picturesque little towns." And any self-respecting Texan might know as much. Forty miles west of Austin and fifty north of San Antonio, the Hill Country is within...