Good advice! We were smart last year when we went (our first time). We arrived around an hour before they were kicking people out and scored the two comfy chairs by the entrance to the bar area. I do believe they are officially Canadian Pooh's chairs but since she wasn't there I felt safe.
We made our way out towards the Blues Brothers area (restaurant entrance) about 30 minutes before the official "release". They ended up dropping the rope about 15 minutes early and we were some of the first through Wolfman. We covered 3 houses really quickly before the crowds started making an appearance.