I can't remember your reasoning for using transport, is there no way you can get a taxi or car rental? I would not be happy arriving at the times they do.
This time we arrived 10:45am just a little early, we had to circle the car park 3-4 mins until they opened up, parked up, checked in, lined up for photos with Donald & Daisy, toilet etc boarded 11:45 straight to Cabanas for opening at 12 noon. We didn't get 2 mins to relax from arriving to sitting at our meal at 5:55pm(arrived 10 mins late)
OK we fitted in a DISmeet but that was only 45 mins. Below is the experience of someone on our cruise, I would hate to be boarding at 2:45pm, especially on a 3 or 4 night cruise, its so rushed with meal, unpacking, lifeboat drill & sailaway party all by 4:45pm.
"We'd thought about trying to make the DIS meet, but the
DCL ground transfer from the WDW Beach Club didn't get us to the terminal until 1:45 p.m., and we didn't get on board until 2:45 p.m. (At which point I rushed to get us on the waiting list for Palo, my wife found the stateroom, and we rushed to get food at Cabanas before they closed it down. I will never use the DCL ground transfers again.)"