Probably need to look that up on the Port Canaveral site- or type in Port Canaveral in the destination part of mapquest.
The quickest way from DB would be to jump on 417 North (towards the airport) then take the 528 exit that says airport/port canaveral. I don't know what exit that is but since I go home that way every day, I will get back to you. Then you would just follow the signs to the terminal.