LOTS of info in the Florida Departures forum, where I expect this will be moved -
https://boards.cruisecritic.com/forum/386-florida-departures/
I stayed in the Hampton Inn Cape Canaveral in March. To get there from MCO I rented a car, which could then be turned in at the rental agency office (Enterprise, National and Alamo have a shared office near the port) where I was then able to board a shuttle to the cruise terminal.