I regularly fly to the Alps, but never in the winter. The chance of getting vfr weather all the way across France and on into the mountains, and then for the return, is almost nil.
If you fly what the French consider a ULM, you are excused the site specific flight test for some ski destinations (Megeve is a fun one, but it is not a place to have sudden doubts about your ability!).
In general, forget it until you get an IR, and a known icing machine, and a French mountain rating.