Leisure Group Travel readers tell how they incorporate surprises and hidden extras into their tours to keep passengers happy. Readers responded to our question: “In crafting itineraries, what do you add at little or no cost that makes a big difference in satisfying customers?”

Some tour organizers provide a gift for each passenger. It could be an umbrella, a hat or rain jacket. Others offer onboard snacks and a cooler with water and soda. Responding from a European riverboat, one operator said she leaves a recipe, piece of chocolate or other item in each cabin every night, plus a written description of what passengers will see the next day.