Here is a simple bonus promotion for Delta Skymiles members - follow this link, and enter Delta Skymiles as the program name, and 5765 as the promotion code - and you'll get instant free access to the Hertz #1 Club Gold membership. Of course, if you are not (yet) a Skymiles member, nothing is stopping you from heading over to Delta.com to sign up (also free).
The program normally costs $60/year, but that fee is waived for you. Sadly, the perks are limited to instant vehicle pickup and drop-off, but when you are in a hurry at the airport, every saved minute helps.
You'll need to provide Hertz with a credit or debit card, and your drivers license number, and after your first rental as a Gold member, you'll be able to bypass the desk and walk right up to your car. But best of all, you'll get a nice shiny gold card for your wallet. A list of all Hertz #1 Club benefits can be found here.