The two cruises I took, we left at 9am both times. The first time it seemed like we had a longer wait after we were
Checked in but was able to get the Minnie pic. My cruise last year, we had a longer wait to go through security and by the time we checked in and used the restroom, they started boarding 10 mins after that. We managed to get a few pics outside and took one of Minnie walking by...so 9 worked for us by the time we drove, dropped the bags, and parked the car. I'm an Orlando local so having a sunpass helps with the tolls too.