Sugaring season is serious business in Vermont, particularly for Abby and Trent Roleau, who bought a rundown farm in Bristol and hope to resurrect it by making maple syrup. Above, Abby carried one of their three children, 5-month-old Bradley, on her back as she and her husband put labels on jugs. At right, Trent moved wood that is needed in the boiling process. Thomas Farragher column, B1.