We were there Oct 10-15. I had about the polar opposite experience as Venomhatch.
The majority of the buses were pretty crowded. It was a running joke with my family that when you are leaving a park you didn't need to know what # station to be at for the Riverside resort because you could just look for the large crowd.
I understand that RS and FQ share buses. I'm sure that makes sense. But something just doesn't make sense. Leaving MK the Riverside station had a
ton of people waiting while the FQ station had zero. And the driver was there so we walked over to ask him if he could go to RS. Of course, he said no.
So, we waited... and waited. First bus was full so we got on the second. And wouldn't you know it, it went through FQ.
Another time, the Riverside but went to FQ first (forget what park we were coming from) and the driver didn't announce where we were. It was dark and I had no idea. One of the passengers mentioned it was South so we got off. We were at FQ.

Now, someone else mentioned a nice 10 minute stroll to get to RS. At 11PM with 2 tired kids and a hungry wife in the dark not knowing exactly how to get to RS, I was ticked.
Of course, we stayed at FQ yars ago so I remembered the boat. It got us to RS but at least 30 minutes later than we should have. Now, i fully understand this was partially bad info from another person on the bus but the driver should have made the announcement himself.