Hertz - Minivan rental discount promos in HNL?

I am looking to rent a minivan in HNL in August. Prices for minivans are looking pretty steep right now. http://www.flyertalk.com/forum/frown.gif

Does anyone know of any discount codes/promo codes that could help me find a lower rate? I had found a promo code for a rental in MCO that saved me $$$ so I am hoping for the same luck in HNL.

Thanks,