Just returned from a FW stay a few weeks ago and the morning route is FW to WL to MK back to FW
In afternoon the route is MK to WL to FW back to MK
If you catch the morning boat it will be about 8 to 10 minutes to MK once you leave WL, however, if you just missed the boat it could be a 10 to 12 minute wait for the next boat. I timed it last trip since we biked to WL from FW and we boat just pulled away when we stepped on to the dock.