They do this every year. Get a couple of pics of snow on the website. Openning day means when the ticket window opens up. I did the openning day thing once when I had a season pass: I was openning the share house that weekend. 3 runs in three hours on East Glade. They herd you into the back of a pickup like cattle, drive you up to the canyon quad, and the you ski down EG to the Glades Tripple where there is a line like you will never see there when the season is in full swing. Not bad, considering it coast me nothing extra. They charge $25 for that. If I had to pay that, combined with a hotel, it would not be worth it.
Openning day won't be before the first weekend in November. Pre-ASC, they would open as early as now. That was when it was about pride.