Where should I meet my sister at CDG Airport? I arrive at Terminal 1 an hour before she arrives at Terminal 2. I have never been in this airport.
If you are planning to to use the RER trains to get to central Paris, you could meet her at the Terminal 2 SNCF (the French national rail company) information booth. From Terminal 1 level 2, find the CDGVAL airport light rail and ride to terminal 2. The SCNF booth is on level 2 near the CDGVAL station, one level above the train platforms, and has tickets and information for travel into and about the city, and for passenger trains to elsewhere in France if you aren't going to Paris.