Candy canes have proven to be a sweet dessert for the V&T.With its main tourism season over, the Virginia & Truckee Railroad Co. moves into holiday events such as its Christmas-themed ride starting this week as well group trips for businesses, nonprofits and families.“Our main business to keep the doors open is our summertime excursion trains,” says Tom Gray, who with his 91-year-old father Robert, owns the historic steam engine line.But a secondary revenue stream, especially during the colder months, is provided by specialty routes such as the Candy Cane Express, where elves serve hot chocolate and deliver letters to …