The RER is a regional train but acts as a local train for a peak route in Paris. It tends to be very packed ie VERY packed at peak rush hours and midday between CDG-Etoile and Auber stations. Rush hour in Paris is later than in America ie 8am-930am and 6pm-7pm, with noon-2pm being quite busy on some routes as well.
Some of the trains on that route are one level; others are bi-level. If the train is full, don't expect room for your luggage; literally during peak times think of the Richard Scary plane to Rio, or the metro in Japan. Plus many stations have stairs and not elevators (the
www.ratp.fr site will tell which have stairs only) You will need to go up or go down a few stairs on the bi level trains unless you plan on standing in the entry way the entire trip. Don't plan on bringing more than a 22 inch size suitcase - what Americans consider a 'carry on' and what Europeans take as checked luggage because it will be refused by the airline as carry on.
The longer distance train will have a small luggage rack shared by everyone in the carriage. Often on peak times/days/routes that luggage rack is packed and overflows into the entryway of the carriage, so people stand for the journey holding their bag.
By law in France any bag you store must be tagged. There is also a rack above your seat which you are expected to your for the majority of your items.
OK, soooo even on this Elipsos overnight train we can't take luggage? Bummer. I was looking forward to the train idea. I guess the train is now out then as I am SURE SURE SURE we will each have 1 carry-on size bag and at LEAST one large checked size bag (probably about 30") as we cannot go on a cruise for 10 days with any less (day clothes + dinner clothes etc).
When you exit the RER at Marne-la-Vallee/Chessy watch for the exit signs. The exit is on the side of the station, right next to the
Disneyland Hotel and the bag check for the main park. It is just a few seconds away.
If going to your hotel first then you can exit out the main doors and take the hotel busses which leave from directly in front of the station. All are walkable; the Santa Fe is furthest and is only 10-15 minutes via Disney Village; the Cheyenne, Sequoia and Newport Bay are about 10 minutes, while Hotel NY and Disneyland Hotel are about 5 minutes. The busses take about 2-5 minutes depending on hotel.
Also note that there are often endless queues for the ticket windows at that station. There are machines which are very simple to use and which are in many languages, but they do require coins. If you are returning to Paris via RER then have enough coin to use the machine, or buy a ticket at an off time if you must use the window.
I thought we could order tickets for the Elipsos at 90 days out & get them shipped to us via Fed Ex?!
I honestly don't know what service a travel agent could provide, unless you find one very well versed in the local travel. Not to offend, but a travel agent sitting in Kentucky, or Florida, or Oregon won't necessarily have ever been to the country you are visiting, and won't necessarily know the ins and outs. You are better off visiting those websites I linked above for local knowledge. I travel all over the world and rely on locals to give me advice rather than MaryLou sitting thousands of miles away who has never been to my destination. (Think of when someone comes to your hometown, and how much real life advice you can offer to them)