If everything goes in your favor you might make it by 10:00, but that's a very tall order. Even being at the park at rope drop, you still need to walk really fast to TSM and hope you're among the first in line. The FP machines at TSM can have some pretty long lines, especially in the first hour. As the PP mentioned, the boats are slow and it's not unusual to wait at the dock for 20 min. before one shows up. They often sit at the dock for 15 min. before departing, then make a stop at Swan & Dolphin before heading over to the YC/BC dock. They take more time to maneuver than a bus, so simply docking is a slow process. It's a long walk from TSM to the BC lobby, especially if you have kids. The best way to guarantee you'll make your ADR on time is to catch a cab.