Morning,
Whilst I have only been to
Disneyland Paris a handful of times, however I have stayed in a number of the good neighbour hotels, which are about a mile from the entrance of the parks and the Disney shopping village, these are the closest apart from the Disney owned hotels. The hotels have a round robin bus service which is quite frequent and makes the distance much closer than many we have stayed at in WDW. Some of these are, the Dream Circus, Kyriad, Explorers, Dream Castle and the Ibis Montevrain which is not on the bus route, however it is 50 yards from the local train, which takes you into DLP within a couple of minutes with the frequent trains. The Kyriad is basic with a good breakfast and the Dream Castle and Dream Circus are the better quality hotel with a good breakfast.
The best thing to do is shop around for prices, use european search engines for the hotels and also trivago. You would be better posting this on the DLP board for more qualified information. I know of someone on Dis called "Steamboat Will" a really helpful and knowledgable, who has been over 80 times, you could PM him, he knows Disneyland Paris better than most.
If you are getting the train in from Charles DeGaulle Airport, it's easy simply go to the TGV in the airport and connect straight to DLP, it took about 20 mins by train and you can use the Good Neighbour Hotels bus to take you to the hotels, it's easy.
When at DLP, just remember that for about 10 euro you can get a ticket into Paris with use of the Metro for a day, and a great way for kids to get a taste of Paris.
Hope this helps.