An update- we did easy go shuttle on the way from CDG to
Disneyland but did the TGV (booked through rail Europe) on the way back. If the tgv times work for you it's my preferred method. They have a service where for 25 Euro you can check in your bags in the morning at the resort and they will be at the train station that evening. Super convenient not having to drag bags through Disney village. Then the platform will come up 20 min before your departure, head there by scanning your online tickets. I suggest just standing in the door way of the train, don't bother sitting down for only 9 min ride! We were off the train and to our gate in under 15 min including security (2F).