Depends on what time in the morning. I'd give yourself 45 minutes the most. I've taken the boat to FW and they waited quite a bit before docking off for the resort.
We did this last year. We stayed at SSR, took the bus to MK then the boat to FW. I don't remember exactly how long it took, maybe 45-1 hour. Enjoy your breakfast, we plan to go back this year.