the more snow at stowe the bigger the crowds, on weekends at least the 7:30 opening weeds out the pretenders and the first 2 hours are generally ski on if all the lifts are running.
its part of the reason I love 4 inch days many days in a row. No crowds still knee deep skiing.
I guess I should clarify. On really epic days you'll get crowds.
But a lot of more casual day-trippers won't drive a long way if the weather is 'bad', even if that means there's fresh snow coming down in the mountains and the conditions are great (if cold).