I am traveling with my 12 year old son, just me and him this trip! I hate the thought of arriving at the airport and finding the rental car desk, then finding my way out of the airport parking lots. So, I'm using Tiffany Towncar to pick us up at the airport to take us to Hard Rock. My son is doing a baseball camp while we are there, so I also need a car. I'm renting that once we get to the hotel. I have it all set up and I think it will work out great. Hertz Rental Cars has rentals directly from Portofino and Royal Pacific. So, for your situation, it may work out that you could just do a daily rental for when you need a car.
Michelle