That is some information that I was looking for, thanks. So the bus left the finish area to go to the resorts at about 6:45AM-7AM?
On Saturday, that sounds about right.
On Sunday, it was probably 7:30-7:45.
This information will be in the event guide, under the Transportation section for each race.
For W&D 10K, this was the info posted there:
Saturday, November 5th
3:00am - 5:00am runDisney event transportation will be provided to/from all Walt Disney World® Resorts, Shades of Green, and the Swan and Dolphin Resorts.
6:30am - 9:00am runDisney event transportation will be provided to/from all Walt Disney World® Resorts, Shades of Green, and the Swan and Dolphin Resorts.
For W&D Half, this was the info:
Sunday, November 6th
2:30am - 5:00am runDisney event transportation will be provided to/from all Walt Disney World® Resorts, Shades of Green, and the Swan and Dolphin Resorts.
7:30am - 10:30am runDisney event transportation will be provided to/from all Walt Disney World® Resorts, Shades of Green, and the Swan and Dolphin Resorts.
This is what it looks like on the digital expo guide screen on my laptop:
You'll see that gap in bus times reflects the period where no buses are running. And as I mentioned above, if there are any delays in the start or it takes longer to get everyone past certain points on the course, they may delay starting the buses back up.