In April, we were told in the disembark instructions that for resort transport we needed to be off the boat by 8:15 or 8:30 (letter is not in front of me) because the buses would depart at 9. And they did. We rolled out at 9:01 and I was close enough to the front to hear that we left without everyone. The stragglers would be put on a bus with multiple resorts.
Buses are grouped by resort area. We were staying at Movies. All of the All Stars plus the Animal Kingdom Lodge were on our bus.