If you can, plan at least 3 days to visit Disneyland Resort Paris (including arrival/departure day).

More time will let you enjoy the parks more relaxed, and from 6 days on you have even enough time to relax or spend half a rainy day at the hotel or in the Val d’Europe shopping/outlet centre.

Traveling there from Paris or the airports? Check the several forums or the DLRPwiki with lots of smart tips and guides :)