Travelling to Les Gets By Train February half Term

Anyone have any advice and or costs on getting to Les Gets in Half Term (february) by train? We are a group and some will be driving on Friday and my partner (a teacher!) can't leave until Saturday am.

It doesn't look as if we can book for a few weeks yet.

Why by train? No idea about the costs, but it seems like the least convenient way of getting there, when you can just fly to Geneva and be in Les Gets 1.5 hours after landing... You go via Paris and change trains (and stations) there to go to either Geneva or alternatively to Cluses or Thonon, and then you will need a transfer, a taxi or a bus, to your final destination. Either way is appears more stressful then just hopping on a flight and will take longer...