Skied both those resorts and can say that Les Arcs is by far the most extensive but... if you are traveling in school holiday time beware of the massive queues on the roads to Bourg saint Maurice, we had 4 hours added to the journey on the way there and 3 on the way back. Change-over day is a Saturday too so traveling on a Sunday will help! The facilities at Huttopia are pretty comprehensive too and from what we could see of the Aire at Montegenevre from the chair lift it was pretty basic.I would expect once the snow arrives that will change. Still cant decide between Montegenevre or Huttopia at Bourg saint maurice.
The snow has already arrived in Obergurgl and Solden and its making me twitchy. This bloody virus is doing my head in.