I have stayed at CS & WL with infants, we loved both resorts.
I would definitely recommend a baby carrier, we used the Baby Bjorn. It was a life saver! She slept through almost everything, including Fantasmic, and Illuminations!
Enjoy your trip, you will love the Wilderness Lodge! I also read your post about the smell in the lobby--there is a smell from Wispering Canyon, but nothing overpowering, your baby should be fine!
Tracey