We stayed at the WL when our DD was 13 months. We had a room that was overlooking the lobby on one side and the pool/courtyard on the other. We had NO issues with noise. She slept like a rock the whole time there.
We stayed there in 2004 in a "wing" and had no problems with noise.
We stayed at the WLV in 11/06 with the same DD who was 6 and the new DD who 18 months. Again they slept like rocks.
I would think the lobby would generate much noise, but it doesn't.
Have fun.