I voted an hour after check-in.
However,
1st ME trip, I checked in about 3:00 pm, left for the parks and when I got back to the room about 2:00 am, the bag was there.
2nd ME trip, I arrived at Ft. Wilderness rather late (midnite) and by the time I checked in and went to the restroom, my bags arrived, so they took both me and my bags to my campsite at the same time.
Our upcoming trip in May, we will be checked in and at the parks by 1:00 pm, we probably won't return till 10 or 11 pm. I'm sure our bags will be in the room.