Many possibilities of accommodations :
In Marne la vallée
IBIS de Champs sur Marne is the nearest (walk)
For the others you can use metro RER A :
Novotel Marne-la-Vallée Noisy-le-Grand
Hôtel Ibis Marne-la Vallée Val d’Europe
If you prefer to stay in Paris
the best way is to chose an hotel near near metro station ” Nation ” or ” Gare de Lyon ” . You will reach Gustave Eiffel university by RER A at the station de “Université Noisy-Champs “. 30 mn