Champery is one of the best places from which to ski the Portes du Soleil ski area with masses of fast lifts and over 600km of well-treated pistes. It's easy to get right over to Les Gets, Avoriaz, Morzine, Chatel and Morgins. There is masses of new accommodation to rent from Avanthay or MDK immobiliers, (we stayed at Chamath with four bedrooms and sleeps 8 from Avanthays).
Champery has become much livelier in the past few years with great restaurants and enough night-life and bars but without losing its village charm and beauty. It was just about the first ski village to be established over a century ago.
If you only want to ski for 5 hours or half a day you can buy a 'Swiss side only' pass which covers Champery, Crozets, Champoussin, Morgins and right over to Torgon which overlooks Lake Geneva. And don't forget the famous Swiss Wall, one of the toughest black runs in Europe; not to be attempted after a long liquid lunch in one of the many restaurants on the pistes!. There are, of course, plenty of blues and reds with a few blacks to test you.
Good luck and happy skiing.