We were able to stay aboard when we did back to backs in October, however if you or anyone in your sailing party is not a US Citizen, you may need to disembark.
We went to breakfast with everyone, and then headed back up to our stateroom to get started on some laundry. We asked our stateroom hostess to let us know when she wanted us out to give it a clean, which is the only time we were kicked out of our room. So while the laundry was going, and Jeryll was cleaning, we tried to have a run around deck 4, but half of decks 4 and 10 are closed off for re-fueling.
There is no food during this time obviously, and the workout room isn't open either, but pretty much everything was fair game to wander to (we did ask at guest services just to be sure we'd be okay just walking around.) Just try to stay out of the stateroom hallways as much as possible because the hosts are going like mad! They were definately "off stage" during that time and it was funny to hear them just be purely relaxed!
We checked in for #2 at guest services at about 1200, and that was that!
Just a heads up....you will hate being at home after doing two weeks (I am envious of those on the repos!)