Make sure you give yourself PLENTY of time. We had 9am ADRs at the Poly last year and thought we had allowed enough travel time, but were 1/2 hour late because they had to switch out boats. Isn't it around 7 that the boats start? I can't remember.
I believe that the resort boat (to Contemporary and Wilderness Lodge) starts running before the MK boat. So, you could also choose to boat over to the Contemporary, and hop onto the Monorail there.
Make sure you give yourself PLENTY of time. We had 9am ADRs at the Poly last year and thought we had allowed enough travel time, but were 1/2 hour late because they had to switch out boats. Isn't it around 7 that the boats start? I can't remember.