Red flags lofted at the suggestion of a side trip to Mexico, so I asked the Information Desk staffer in Big Bend National Park. “You are safer here than in your home town,” she claimed.  (Apparently she considers the Mexican village of Boquillas part of Big Bend.) The next surprise was the Port of Entry, a nice official building on a dirt path leading to the Rio Grande River–no road, no bridge, no Immigration officials, just a friendly Parks employee who prompted us to check and see if our passports were expired or we’d picked up another family member’s by […]