Clothes / New England / RCCL

I thought I asked this question already, but can't find it anywhere so....

Do people dress more casual on the Southern type cruises than northern type?

All of the cruises I have been on, have been going to the Caribbean --- I pack a ton of clothes (Ship/Excursion Casual, MDR casual, MDR Formal, for me, DH & 2 kids)

Every cruise, I come home with a ton of clothes not even worn because I find that most of the ship/excursion casual clothes we wear (typically Carpi's, T-Shirt or blouse or light sun dress) are acceptable for every night on the cruise except for the formal nights, which we do use the formal night clothes...

Having not been on a northern cruise before, I'm not sure if we over pack because of the nature of the cruise we have taken in the past or if that's just how everyone dresses now, on all the cruises.

Since we are flying in for this trip, I don't want to have a ton of space taken with my "over packed" clothes, and since we have to bring warmer clothes anyway I want to use my space effectively :) Thank you!