The Triumph is a relatively old ship and that seems to be the Carnival way when a ship is getting on move it from Florida to one of its secondary ports.
Pre-cruise, New Orleans was dry but bitterly cold and this caught a lot of people out. Judging by cruisers' attire, the souvenir shops did well selling New Orleans sweaters!
Embarkation was slow even in the VIP section where they put the most senile staff to process cruisers as slowly as possible.