[3family]

I’ve used 3 methods of travel to/from CDG-DLP and the other from DLP to Paris, so...

Easiest is private transfer. Depending on price, it may be perfect for your group. Collected at arrivals and on you go

The TGV train will take you from the station to Marne La Vallee station in 9 minutes. It can be pricey but might be worth it. It can take you 5-20 mins from there to your hotel from there (shuttles available, they’re all walkable too)

The Magic Shuttle bus is pretty handy if you’re terminal 2. It was the cheapest method for our last trip. Would use again without issue.

RER trains aren’t recommended. It will take well over an hour and a couple of transfers in Paris. With luggage etc, it’s just not worth it IMO