We'd suggest that you take the Bee Line Expressway and not the Turnpike if you plan to make your cruise on time :o). When you come out of MCO, just head east on bhe Bee Line Expressway (SR 528), and within 45 minutes you'll see Port Canaveral off on the left. You will exit SR528 to the right and loop around, so stay in the right lane, and you'll be fine.
Have a great trip to FL, and Bon Voyage.
J&G