On Monday in New Braunfels, Texas Buc-ee’s Convenience Stores debuted its largest store with a grand opening celebration for customers. The $7.4 million Buc-ee’s Travel Center at I-35 and Farm-to-Market Road 306 features 60 gas pumps, spans 18 acres and boasts a 67,000-square-foot  store. The store offers the chain’s famously clean and hands-free restrooms; an…