Motorway (A43) till Albertville, then national road (RN90) through Moutiers. About 1h15.
Regular trains from Paris, Lyon, Chambéry... Terminus at Bourg-Saint-Maurice.
Chambéry-Savoie or Lyon Saint-Exupéry international airports.
By car from Bourg-Saint-Maurice, go to Seez / La Rosière.
After Seez / Villard-dessus, branch off up to Montvalezan.
Reach the Mousselard village after a few sharp bends.
In winter, the Petit-Saint-Bernard pass is closed. Make sure you check snow conditions and weather forecast.
> More details on Savoy Mont-Blanc Tourism Office
Last but not least, the tourism office gives you the right check-list to prepare your trip.