Give me a day or so to do some investigating on the price to see if the bus line is giving any discount to Carnival guests. If there's no special on right now, passengers will pay around $59 to $79 per person round trip depending on the city you board the bus. I'll probably have to pay the $79, you coming from Orlando which is closer to the port will pay less, I assume. Tipping the bus driver is expected, but not mandatory. Reservations have to be made ahead of time with prepayment.
I'll get back to you with the details ASAP, probably tomorrow. Tonight Bahama Mama will be in her grass hut watching our President make the SOTU address, God bless him.
Thanks for your question and keep 'em coming, folks.
Bahama Mama