I will be doing both dates! My plan is to do B2B (thats Back to back for you non-cruisers) The 1st leg, for those interested, I can purchase bottles of your favorite libation, than when you come aboard for the 2nd leg they will be waiting for you.
Another good aspect of cruising with carnival They allow each adult to bring one bottle of wine or champaigne per adult. They also allow you to bring on 1 case of water or pop/soda per person.