I thought you HAD to have that reservation, too, but on our latest trip, a
month ago, we just got on the TGV at CDG. Had rail passes in second class,
but it was full, so we sat in first and paid the difference, which was not
much, for travel to Avignon. Didn't have a res, and didn't have to get one.
Did the same coming back. So even though they say you have to have one
before travelling, you can get on, find a vacant seat, and pay the conductor
when he comes by, and it's not that much. If you know your time of travel,
then do buy your res ahead of time in France, but if not, you can get on
anyway. If there's not a seat, you may have to sit on a pull-down seat in
the baggage/wc area at the end of the car.
ANNE IN va