We have gone from cruises to WDW three times, renting a car (from Alamo/National) each time. We have used a cab, Lyft, and the car rental shuttle from the Miami port to the car rental center at MIA airport, then returned the car the following day at the resort. Since we stay at BWV, we return the car at the nearby Dolphin hotel, but all the major car rental operations have locations in WDW. National/Alamo are at the Disney Car Care Center, the Dolphin, and one of the hotels in the Disney Springs area along Hotel Plaza Blvd. The others have locations in other of the Hotel Plaza Blvd. hotels. We usually pay about $70 plus tolls and gas for the one-way rental.