Need to rent a car ( want to use National) for one day .We will be staying at POP, arriving early , around 10:00 am. Is it easier to rent from CCC ( as I am told they will pick me up and take me to the rental center??) Or is the Dolphin closer to POP, and they would pick me up as well?? Or would I have to get there on my own? Just want to do what is the most convienient, and quickest.