Congrats on your back-to-back cruise!
My family and I did one on Carnival this summer and it was great hearing the final call for all guests to leave the ship while we sat and watched them depart. We truly felt bad for them.
The weird thing was that for about 2.5 hours, we had the entire ship to ourselves! We were the only B2B cruisers and it was wonderful. They opened up the pool and my children absolutely loved it!
Take care and have a wonderful trip.