The best way would be to park at FW, then take the internal bus (orange, I think) to it. You could park at the TTC, then monorail to CR, then take the Blue launch to FW. It's just a short walk. Just be aware, this boat stops running at 10 pm. (Or you could monorail/ferry to MK, then take the large, green launch to FW.)
I *think* to return, you could just take the Orange bus right to the TTC.