from what I have experienced, if your room is ready they will send you a text whether your have confirmed you are in Orlando or not. I have received room ready texts three times before ever scanning anything at a Disney location. (twice before even boarding a plane for Orlando). the AOA text came about 12 noon, well before 3.
If you scan your band to check in for a ME ride, you will then recieve a text that says your room is not ready (unless it's ready and if it was ready you would probably have already received that text.) You then get another text when it's ready. So all you'd have to do is drop off any carry-ons and get going, you would not have to go to the desk. I haven't experienced that because I've been taking late flights on the check-in day, so my rooms are usually ready before I even go to the airport.
I haven't paid attention as to whether the maps and pamphlets are in the room as most of the time I don't use them.