I decided to follow my own suggestion and look at what the Berrymans have done on the theme. The lyrics to many of their songs are posted on their web site, starting from here.

I found two good possibilities rather quickly: Uncle Dave's Grace, from their House Concert CD, is about mismatched expectations around a Thanksgiving celebration. A later track, Big Dead Bird, is about a family Christmas celebration.

I took a brief look at some of the other CDs' lyrics and didn't immediately spot anything relevant, but a more serious search might be more productive.