Best way would have been to call these folks and ask them. However, it looks like they will be closed until Monday 08:00 am.
Canadian Border Information ServiceFailing that, you could find an inexpensive storage facility in Maine, and leave the bulk of the wine there.
Or, declare it when you hit CBSA primary inspection at Houghton or Port of Calais/St. Stephen or wherever you cross. They'll decide what to do at that point. The lack of receipts to determine the value over the duty free amounts may be an issue.
Sorry, no idea what the duty/tax might be on a bottle of wine. Trying to locate that information on one of our government websites is somewhere between pulling teeth and drawing blood from a stone.
Good luck with it.