For the little that you would save by taking a public bus I would rather take a cab and get there in 20 min rather than over an hr or have to deal with public transportation. WE used one of the town cars one time to do that that had been sitting there at the contemporary, he charged us the same price as a cab and it was much nicer. Just tell the bellmen that you want to go to universal and they can give you info on it and they even talk to the drivers for you, they did this for us.(why not just rent a car for one day? it might be cheaper that way, you can get it at the dolphin)