As it's forecast now, I wouldn't think any stops to Bermuda scheduled for this weekend would happen with Idalia modeled to hang around the area for a few days. Of course, plenty of time for that to change.
That's displacement tonnage. Why they picked a unit of "tonnage" to measure volume is beyond me.
But that's why Icon class, while being 25k gross tons bigger than Oasis has largely the same dimensions of Oasis (360m x 47m compared to 365m x 48m)
I would imagine RC has agreements with some ports that they pay the port fees no matter what. Maybe Carnival just takes that on the chin and refunds it anyway, even though they still owe the port.
I've never been bothered by "hotel noises" (good way to describe it) in the higher up cabins. The only thing I've really noticed is the DJ on the pool deck either on his mic or just the bass of the music. But that's subtle and doesn't go late into the night.