Back when I lived in the GTA we used to go to Blue for new years eve every year. The slopes were quiet but there was always a good party in one of the bars!
Last year we went to Lake Louise for boxing day, hill was almost empty... The day after it was a zoo!
I'm trying to convince my GF that we don't need to be home for xmas, and that the 24th-26th is a perfect time to be at one of the hills in our area.