If you flight lands, on-time, at 11:56, that means you are off the plane around 12:15ish and walking out of the gate area. That gets you to DME area around 12:30ish. Wait for a bus, onto the bus and ride to POR....it's now 1:30. You'll want to go to your room, if it's ready, and freshen up a bit. And we all love heading to our room to check it out as soon as possible!! You could be at the boat dock by 2ish..wait for the boat, ride to DTD....you most likely won't make it. The ride is about 15-20 mins, the wait can be between 1 and 30 mins!!! Depends on when the last boat left the dock and how many people want to ride.
We normally say not to book any ADRs for at least 4 hrs after your flight arrival. The one time I had to be someplace, about 90 mins after getting to my resort, my flight was delayed 3 hrs!!! So, the plane was departing Boston at the time I should have been landing in Orlando...missed my function!!!!