You can purchase
Disney Cruise Line bus transportation for an extra charge. Other options include using a Towncar service (such as Tiffany Towncar or YourRide) or renting a car (picking up at the airport and dropping off in Cocoa Beach).
When using points, you have the same transportation options as someone booking a 3-, 4, or 7-night cruise with cash.
DVC Member Services can tell you the pricing.
For information on car rentals, see
http://www.dcltribute.com/carhire/
For more about transportation options, see
http://www.fortunecity.com/campus/brigham/612//ground.htm
For our 7-night cruise on
DCL points earier this year, we did one-way car rentals at each end of the cruise. Not only did we spend less than if we had bought DCL bus transportation for all four of us, but we could use the car to drive to a restaurant the night before and to visit the Space Center on the final day.
By the way, seriously consider flying in the day before your cruise rather than the morning of the cruise. It's a much better way to start a cruise vacation. You won't have to get up a 4:00 a.m. to go to the airport, and you won't worry about missing the ship if your flight is delayed or cancelled. And renting a car will allow you to stay at any hotel in central Florida not just at those served by the DCL bus service.