It's best to have the same cabin but no need to.
We have done it and doing it again this summer.
So on online check in say, to Disney Magic when it asks to leave the ship.
On the 2nd cruise do not put flight details on.
They are two separate cruises, tips, onboard account etc all settled end if cruises both times.
On ship restaurant head server may ask at a End of cruise one if you want same team or a new team and different rotation.
System on disembarkation day may vary by
Country.
Port.
Ship.
How many back to back cruisers.
Yes done that...I guess it would kind of be like a double dip cruise too, with the two trips to CC. Which would be awesome.
We did a B2B and honestly, it wasn't worth the hassle. Our experience probably wasn't typical, but take it for what its worth.
The day began immediately after everyone else left the ship. We met in one of the public lounges, were checked off the list, then marched off of the ship. We scanned out of ship just like you would if you were going ashore.
We then lined up on the second floor of the port and waited. We weren't allowed to use cellphones and everyone had to remain "in line."
After about twenty minutes of waiting, we were marched downstairs and through the now empty luggage area. We then had to stand here for about fifteen minutes.
We then got marched forward to outside of customs where we had to wait in line about another twenty minutes. Some confusion ensued at this point where they thought there were still passengers on the ship. So we had to wait for that to be sorted out.
Then we were marched through customs and had to hold our passports up. No one really inspected them or stopped us. We just marched through single file and were brought back outside of the customs to wait in line again.
Once we made it through customs, all of the ship employees were marched off the ship and had to go through customs as well. All holding their passports up for inspection.
When the last of them had made it through customs, we were marched back upstairs to the second floor of the port. We waited in line for another twenty minutes or so as the employees cycled through and back onto the ship.
When the last of the employees were aboard, the customs officials came through again. They spent about five minutes inspecting the ship's computer, before heading back off the ship.
We were then allowed to board the ship again, a few moments before the first of the new passengers were allowed on.
All told, we were off the ship at 9 to 9:30 and back on it between 12 and 12:30.
This would be less pleasant than what we experienced. Which port was this?
This was Miami. I don't know why it occurred and, from what I understand, it was unusual. It just seemed like a conflux of bad coincidences that made things worse as the compounded.
My gut tells me that the person representing the cruiseline was new / having a bad day / confused... And met with someone from the port that was new / having a bad day / confused... So we B2Bers were left in the crossfire.
I wouldn't use my experience as a horror story not to do it, just as a warning as to what could happen. Personally, the events of that day negated most of the value of the B2B. I wished that we had done it back when security was a bit more easy going.
DCL is not in Miami year-round and every port probably has it's own processes. I guess Port Canaveral manages this more easily as the terminal is only Disney.
I've wanted to try a B2B on the Dream to experience a 7 night on it, but the getting off/back on process and repeat of schedules makes me feel like I wouldn't enjoy it as much.
Typically
Letter last night stating a meeting place and time.
Meet up.
Go off,
We got a letter on the last night telling us to be off the ship by 9:30 am, return up the escalator and check back in. We got off about 9:15, got through customs quickly since most people were already off and, of course, we didn't need to get luggage. Just told customs official that we were reboarding so nothing to declare and were waved through. Back up the escalator. We were the only people there. They were just closing out the prior cruise so while we waited for about 5 minutes for them to do that we chatted with the CM for a bit. She then checked us in and had us wait in the concierge lounge. We had our iPads with us so were reading for a bit and two other families finally joined. We were then allowed back on about 10:30. We then proceeded up to the Cove Cafe, got a coffee or two and read for a couple of hours until it was time for an early lunch.
Everyone's experience is different; if there aren't many people doing B2B it seems as though they use the procedure we had. Reboarding time will depend on a number of factors from how long it takes to close out the prior cruise (which is partially dictated by whether and by what time everyone on board has settled up their account), any special work they need to do with no passengers on board and who knows what else. I just know that our B2B was easy, quick and had minimal disruption to our day. We pretty much just got in a period of time to relax and read which is what we'd have been doing if it hadn't been a turnaround day.