I worked for BV in the Les Arcs/La Plagne valley. The area and sorrounding valleys is just so vast it would entertain you for a whole two month season without fail. From Bourg St Maurice base you’ve got LA/LP, La Ros & La Thuile, St Foy, Tignes/Val D, Cormet de Roseland, Côte D’Aime, Beaufortain, even over the back of La Plagne towards Courchevel.
It’s massive and the local IGN maps are surprisingly accurate even showing the sneakiness of trails.
The beauty of it is that if you stay in BSM, everything in the sorrounding valleys drops back in to it and if you finish off down in Moutiers or Albertville you just get the train back.
I may be biased as I lived there but it gets my vote