Went out there about 10 years ago. Spent 4 nights at the Chateau Lake Louise and 4 nights at the Banff Springs Hotel. Snow should be good in January, but make sure that you bring your long johns. Lake Louise is a great ski area. It's not as extreme as a Jackson Hole, but it has some of everything, like trees and bowls. You have to ski Sunshine Village, too, if you go there. The town of Banff is awesome. Incredible scenery and lots to do. No ski in/out at Lake Louise, so you'll be driving every day or taking a shuttle. Drive there from Calgary is exceptionally scenic.