Time Line
I belive the time line is off a bit. We know it takes place during the Christmas season.
Willie tells Tommy, he and Tracy went to her parents house for Christmas
(so we know Willie returns home after Christmas)
When Tracy arrives, Willie tells her he's been drunk for two weeks.
(Willie arrived after Christmas, so this would mean it's after the new year when Tracy arrives.)
Paul asks Willie what he did to Andera in the ice shed because she was supposed to stay through the New Year, but she left early.
When Willie and Paul are with Gina at the store, Valentine decorations can be seen on the windows.
Just an observation.
Hey, did you ever try dunking a potato chip in champagne? It's real crazy!