I would focus on Grand Montets, but other nice areas as well. there is free and effective busstransfers between all areas. You should definitely go up to aguille de midi as well, 3800 metres of spectacular view and skiing. but up there youre better off skiing with someone with local knowledge due to crevasses( doesnt have to be a guide). I stayed there for 3 months -01. great place, and no, there`s not only frenchies there. alot of swedes, norwegians and other europeans and americans there etc. stick to the scandinavians if you wanna party. have a nice trip. Norwegian skier