As an alternative suggestion, we use Mears private town car service. It is more expensive than uber but we need a car seat and this allows us to pre-book something that will have one. The driver is always waiting for us when we deplane at the bottom of the escalator to baggage claim. We have done this for Disney World trips as well as cruises and even when we had a pretty significant flight delay, when we arrived the driver was right there. FWIW, the cost does already include gratuity and we have never once had a driver seem to expect anything else.