All I can say is the Wilderness Lodge room was two small for DH and me. Can't imagine four adults and a baby. Although supposed to be smaller, we thought POR rooms were actually roomier. WL rooms are very narrow. DH and I were tripping over each other and the beds and the armoir every time we tried to go to the other side of the room. I like the idea of other posters to try to change to CR. The rooms are quite a bit larger and more comfortable than WL rooms.
If you could get a WL Villa that would be great. Or, I'd even consider Wilderness Cabins if any are available, although transportation there is terribly inconvenient.
If nothing else is available given Spring Break, well make the best and have fun anyway. Try to have very active exhausting days so everyone is really tired when you get back to the room. I've shared ship cabins with four adults before and those are smaller than WL rooms. We managed!