we're staying at the AKL pre cruise, we stayed there last year and loved it so really looking forward to getting back there!!
i hope you do make it on the cruise too! have you thought about the DCL transfers for the way back? we're hiring a car wednesday and dropping it back off on the sunday when we get back off the cruise. the 4 day car hire plus the parking fee came to the same price as the DCL transfers, and it means we can leave some of the luggage in the car while we're on the ship.
i think last year it took us about an hour and a quarter at the most to get from AKL to the port. we were at the port by 9.15 but had to wait til 10 before the gates opened.
i've just checked the park hours and all 4 parks open at 9am on the thursday that we sail. if you arrive at 6am at MCO you should be able to get to rope drop at any park no prob. if you're at WDW for 3 days post cruise, on the thursday i'd personally chose whichever park you plan to spend the least amount of time at. that way, after the cruise you dont have to waste time revisiting a park that you went to a few days ago.
btw portsofcall, you havent told us your name!!
The first thing you are likely to want to do is claim a locker. They are located in the hospitality center out near the Aquaventure between Cove Beach and Atlantis Beach. There are other hospitality changing centers located in Royal Towers and in the SeaGrapes Tunnel by Beach Towers.
Lockers are not free, expect to pay $5 - $10 depending on locker size.