I lived in Banff for 7 years (100-150 days per season)
DO NOT go between Mid-January and Early-March... you will be disappointed, there is always a dry spell then.
Best times for pow: November, early January, Late March -> Mid April
Sunshine Village gets lots of snow, consistently. Lake Louise gets only 1/3 of that snow, and is always icy. Kicking Horse is wicked (one of the best hills in Canada) and is a must hit.
Even though Banff is the first to open in early November, everyone knows it's all about the dry spring pow.
Base yourself out of Banff, use a car to get to the hills (sunshine 12 mins, louise 40 mins, kicking horse 1.5 hrs) You're going to have a blast in Banff! (you may never leave)