Re: First time questions
No, you *aren't* required to give a credit card. You can make a cash deposit on your sign and sail instead. Or you can use a VISA or MC check card.
You didn't mention which ship you were sailing, but on Carnival, tea, lemonade, punch and coffee are free at meals.
If you are a big soda drinker, consider purchasing a soda card. Unlimited soda (one person per card) for the entire week at about $4 per day.
CarnivalSensation February 2015
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Carnival Imagination Sept 2007
Carnival Sensation Dec 2006
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Carnival Miracle Sept 2005
Carnival Glory Sept 2004
Carnival Fantasy Jan 2004