Well, sometimes during busy times, there are dedicated WL boats and other times not. Sometimes the boats go in one direction and othertimes not.
Sometimes, there are no lines for the boats and sometimes there are.
So, yes, you need to be aware and not hesitate to ask the CM before boarding a boat/bus/whatever ... "Will this take me to _______?"
I've had times where it just happens to be a change in shift, service, route, etc and then they will direct me to get on something else.
GENERALLY, the boats do route WL-FW-CR (or reverse) and WL-FW-MK (or reverse).