...and this is NOT included with your hotel room.
It sounds like we did the same thing you did- parked and checked into the hotel before dawn on morning #1, and didn't leave the hotel again until late in the evening of day #2.
I honestly have never seen this resort in daylight.
In our case our room wasn't ready when we checked in, so we left our bags with bag services until we came back from the park on the first evening, and stowed them with them until we left the following evening.
Just remember that you will need to have your express pass printed out at the automated kiosk in the lobby BEFORE you leave the hotel for the parks on the first morning. You do not have to have physically gotten into your hotel room to do this.