Doug, I checked rental cars the HEEHAW the other day and was surprised at the low the rates were. My United Presidental card gives me a free membership with Avis Presidents club so I get a 2 category upgrade for free. So I get the subcompact price of $51 ($48 if you pay upfront) for a rental of Friday to Monday. Then I get upgraded to an intermediate size car so that's about $16 a day. I am not sure what you consider a good price?
You might want to check all your credit cards since they all seem to have a program with rental car perks.