I am sure you will be able to. We sailed from Palma on the Star sister ship in June and we were allowed to disembark to have a look round palma.
Yes of course you will. Once you are checked in you can go ashore almost immediately and your luggage will be left either in your cabin or outside of it however if you have just flown in and have not seen your luggage since you checked in that the home airport you might just like to check it has all arrived so that you can start the search before the ship leaves. One more cautionary word....don't miss the sailing, be back at least one hour before cast-off time. Neil Dow.
Yes you can go back off as long as your back in time to set sail at night you can go out and buy some duty free mr mcguire from crossford dunfermlin.