Every year, Steve Giblin and his six siblings celebrated Thanksgiving at their parents’ house in Marblehead. As they grew up, got married, and started families of their own, the get-togethers grew ever larger. “Pretty soon we had 38 people descending on Grandma’s house,” said Giblin, 59. “Half the people were sleeping on couches and the kids were running around.” So, 15 years ago, the Giblins decided to move their annual holiday gathering to a place where everyone could have their own bed and no one had to cook for a crowd: the Cranwell Resort in Lenox. Giblin’s parents have since died, but …

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