We are flying in the night before cruise and driving a rental car to Port Canaveral. It's looks like parking at the Port Canaveral parking lot is around $64 for a 3 night/4 day cruise. There's offsite parking lots that shuttle you over to the Port for what looks like half the price. Is the convenience of parking at the Port worth it or save the money, park offsite & have the shuttle drop off at Terminal?