Do you think you could survive a night on a sleeper train in Vietnam? I took two and learned some lessons along the way. Like many who visit Vietnam, I was determined to make the most of my time and see as much of the country as possible. While Vietnam is a long, thin country with most of the places worth seeing located in a line down the coast, the country is deceptively large. As a result, travel times between places may be longer than anticipated. I didn’t have many days of holiday left this year after starting a new job in May, but I had my heart set on seeing…