Hi Garry
We stayed at Des 4 Vents, Crevecoeur-en-Brie. The site is listed in the Camping and Caravan Club Carefree Summer 2005 Brochure and can be booked through them.
The site is about 5 miles from Disneyland Paris and you can get back into the site after the late night Disney Parade. Adjacent to Disneyland is an RER railway station with a fast (35 min) link to central Paris (Gare de l'Est. There are a range of cheap train tickets and tickets to French museums, etc available from the station. You can park near the station.
Des 4 Vents is clean and set pleasantly in a shady orchard. It is quiet and set in peaceful countryside. A baker's van calls every morning but there is no shop on site or in the immediate vicinity. There are some games facillities and an outdoor pool but no other entertainment. The owners are friendly and helpful and speak English.
This site has been mentioned on this forum previously - you can look back.
Have a good holiday!