I'm getting ready to take the plunge with the rental car! I suppose it's time since my trip is June 3!! I wondered what the right combination is for the codes for National? I was going to go Dollar and will still check them out before I make my final decision, but everyone's talking about National's price drop. What are the best codes to use? I see you can use a 1. Product Rate Code, 2. Contract ID # plus a 3. Coupon ID #. Is the EA # a separate bonus as well? Any help would be appreciated. I would like to have a convertible and tried to put some codes in last night but it said something about being over the maximum number of days or something. HELP!!!