Some people prefer to book their own land portion because it tends to be cheaper. I booked through Disney and had not thought to check on them separately.
One thing that I liked was that we checked into the hotel (land was 1st ) and then we didn't have to check in at the ship. We just got to walk right on. We arrived at about 1:30pm so there was no line to board.
You didn't mention how you are getting to port. If you are taking a towncar service (which I recommend anyway-just my opinion)
you won't have any problems.
If you do your transfers through
DCL, you would have to take your things to a hotel that has pick ups or go to AK in the morning (you must notify them the night before) I'm not sure if they still do this with AK or not. Plus, you do not really have a choice as to the time you are picked up. I think the buses start to pick up around 11 from the hotels.
As I mentioned, I prefer the towncar service because you can get to port earlier and get reservations at palos and the spa. Plus, even though it's only a few hours difference, it gives you more time. We did the DCL buses the first time and a car service the second. We were more relaxed because we didn't feel like we had to rush.
Have fun!!