If you’re located in Aruba or Martinique catching the bus from RR may be easier as from what I’ve seen on these boards, the guests staying at Riviera haven’t expressed any bus issues. No one stop at CBR is better than any other per se however do keep in mind that buses coming on to the property enter the main entrance to CBR and the first stop is Jamaica so it’s possible buses to parks may be full as they continue through the property. The buses make a clock wise circle. We stayed in Jamaica and only had one instance where the bus to MK was full and only some families got on. However, I feel like the buses are bouncing around as needed, so as more buses are in demand, they do come, just have to be ok with waiting.