On my most recent stay (last week), a split stay, I selected the same options at both resorts, and thought I'd set up room charging. Yet at the first resort, I had to go to the front desk and even at that, I got a call when I got to my room that I'd forgotten to set up room charging (Umm, I thought I did that on-line beforehand). Anyways, for the second resort, I got a text in the early afternoon that my room wasn't quite ready, then about an hour later (it was around 2:45pm) I got another text telling me my new room #. And there was no problem with room charging. I can't remember doing anything different beforehand at the two resorts, so I'm a little puzzled about the difference in what happened.
By the way, at both resorts, there was a schedule of activities in my room, but it was obviously previously used. At one resort it had coffee spots all over it. There was no "welcome packet", so the only way I knew park hours was to go on-line or watch Disney TV. I missed the "welcome packet".