I've used trains when I took my kids and a friend each to Europe for skiing a few years ago. Six of us plus baggage so a car wasn't really suitable. It was fine. A pleasure even.
Paris to Bourg Saint Maurice needed a couple of changes. Bus up the hill to Tignes. Bus down the hill a week later and funicular up to Les Arcs. Train to Annecy. Bus to Cham. Bus to Milan to fly home. Easy.
Paris to Bourg Saint Maurice needed a couple of changes. Bus up the hill to Tignes. Bus down the hill a week later and funicular up to Les Arcs. Train to Annecy. Bus to Cham. Bus to Milan to fly home. Easy.