One rainy afternoon, a busload of 65 people crammed themselves into D.L. Menard’s three-bedroom house outside Erath, Louisiana. Every day, it seems, folks from other states and other countries stop by the Menard’s home in rural Vermilion Parish. They might be looking for inspiration from the well-known Cajun songwriter. Maybe they’re interested in ordering one of his famed wooden rockers. More than likely, they just want to share his company. One recent afternoon before an East Coast tour, th...