Fly to Calgary and stay in Banff/Lake Louise - impossible to be dissapointed. There's already great snow at Sunshine. The town of Banff has lots to do day/night and is close to lots of great skiing, sight-seeing, and other winter activities. Hotels are abundant but if you want a fantastic hotel experience, stay at the Fairmont Banff Springs Hotel or my favourite, the Rimrock Hotel.
Banff Springs Hotels - Luxury Banff Springs Resort Hotel at Fairmont
The Rimrock Resort Hotel - Banff National Park - CANADA
Or if you want to stay somewhere a bit more economical but still nice, try the Banff Park Lodge.
Banff Park Lodge | Banff Hotel & Conference Centre | Canadian Rockies
Getting to Calgary from Vancouver is a breeze with a multitude of daily flights on Westjet and Air Canada. Staff travel on both is easy but Westjet is best save for the fact that you have to pay for tickets in advance.
Rent a car or take one of the many shuttle services to Banff. Driving time is about 1:15. Banff is in Banff National Park so you'll have to pay to get a park pass at the parks entry. The town of Banff has 3 great ski resorts within a 30 min drive. Norquay is 10 mins, Sunshine about 15-20 and Lake Louise is about 30. All have shuttles. Many times you can get a multi-pass giving you access to multiple Ski Resorts over a 3-7 day period.
Banff, Alberta hotels - Banff National Park - Banff, Canada
Sunshine Village Ski & Snowboard Resort in Banff (Alberta) Canada - Banff (Alberta)
The Lake Louise Ski Area & Mountain Resort - Alberta, Canada
Mt. Norquay | Banff's Family Ski Resort and a Tradition since 1926
Eastern Canada has a lot to offer as stated above but the Skiiing doesn't come close to the West's and snow can be hit or miss early in the season. If you do go east, Mt. Tremblant is by far my favourite and is easily reached from Toronto, Montreal or even Ottawa.
Mont Tremblant Ski Resort Official Site - Ski, Hotel, Condos, Golf, Spa, 4 Seasons Vacations in Quebec, Canada
Cheers