Alex2kMommy said:I imagine this would depend on your hotel. We'll be staying at the Disneyland Hotel in April, and my understanding is that we'll be able to do the paperwork for check-in and leave our luggage, but likely won't get into our room until the 3pm check-in time. If the room happens to be available at the time of check-in, we'll be able to get in right away.
You might want to call your hotel to ask their procedure.