Welcome. I'm not sure about Carnival, but I know RCI has a luggage valet service. On certain RCI ships, for $20 or so, plus bag fees for your airline, they will deliver your boarding passes and take your bags to the airport.
I'm not sure what you will have as far as checked bags vs. carry on bags. Again, having not been on Carnival, I'm not sure how this works. On RCI, on the last night of the cruise, your checked bag for the cruise must be packed and outside your stateroom door by midnight for the baggage handlers to take and bring to the holding area, and it will be offloaded and brought to the baggage claim in the morning you debark, unless you do a luggage valet service, if Carnival offers it.
They need to get the ship turned around for the next cruise, so I would think you would get the boot around 11:00 am or so.
2007 - Majesty of the Seas (Bahamas)
2009 - Enchantment of the Seas (Western Caribbean)
2010 - Freedom of the Seas (Western Caribbean)
2013 - Golden Princess (Alaska, roundtrip from Seattle)