In your opinion what is the cheapest way to rent a hybrid (and guarantee it is one)? I'm not so concerned with whom I rent it from rather price is most important.

I am planning a weekend road trip from Dallas (where I live) to Little Rock from Aug 15-17. I can pick up anywhere that makes sense in the Dallas metroplex, but I live near DFW in the Las Colinas/Irving area.

Is priceline the way to go? Hotwire? Directly though one of the car rental sites?

Please let me know what you think. Thanks.