I think most places here in the east tend to start blowing well ahead of opening. I thought I saw something this summer about Sugarbush's plans being: start making snow Nov. 1st, open North on Nov. 18th. This would be weather dependent of course. SR must figure they can stockpile enough to make it worthwhile.
As of right now the warm weather looks to only be on Sunday with Base lows in the mid 20's and highs in the mid 40s it really does not look to bad Killy says they are currently blowing and will open next week