I am going to Chamonix on January 8-15 with my 14 year old son, and we are both from the US. We will be skiing for 6 days in the Brevent/Flegere ski area, staying at the Residence Pierre & Vacances hotel on La Riviere, which is about a 10 minute walk from the Brevent lift. I am an advanced skier and my son is intermediate, we have never skied in Europe before. We will access Chamonix via train from the Geneva airport. Is there anything I should be aware of or any tips before I book the flight and hotel package?