lake louise will be open for the november 11 long weekend.
they always make enough snow to open some of the frontside greens by this date.Unfourtantely this is all that is usually available for opening weekend.
however, the canadian rockies had an exceptionally good early season this past year. i think they were able to open the paradise chair and summit platter in the first or second week. by the end of november, the whole mountain, minus elevator shaft an er 5 was open. the conditions were fun but my skis took a bit of a beating.
most years won't be quite as good. there will be skiing, but it isn't worth a special trip, imo. april is the safest bet for the alberta rockies