We always cruise in February but try to avoid Jersey week/President's break now, if possible.
Did b2bs this year late Feb, early March into mid March.
March cruise was same length, 10 days, but busier, but no issues with college spring breakers, more baby carriages, though. 🙃
The 12 day is likely to be very popular with all cruisers as many like the longer ones from NYC and currently the only option.
The prices have rapidly increased since our November booking.
The March one is an 8 day Bahamas, PC, so might have more college kiddos this year, but don't really expect masses.