We are flying out of Paris on August 25th morning. So, I am thinking of flying from Nice to Paris airport on 24th and take the hotel shuttle to hotel by CDG so that we can rest that night and take hotel's shuttle to airport on 25th morning. This also gives us few hours more in Nice. This looks convenient to me but I hear very scenic train journey.
I have ready many long forums on this topic. Please let me know if I should take the train. I just booked my flights and I have one day to cancel. It's $100 more to fly.
Even I take the train, I still need to uber from Paris city center to airport hotel.
Cheers