Spent 7 nights at CBR in 2010. Most times, Jamaica (we were in Jamaica) was the LAST spot to pick up/drop off. But it didn't really matter as I don't recall ever having an issue with getting a seat on the bus for pick up and we'd slip into newly vacated seats as people were getting off the bus on the way back "home" at night.
CBR is my absolutely FAVORITE resort at WDW and I hope to be able to get back there someday.