My 2009 Prius is a front wheel drive vehicle. I have been told a Prius should not be towed even with the front wheels on a dolly because the hybrid battery will continue to charge and could create an over charge which would harm the battery. I then asked a certified hybrid car technician from Toyota if I could simply disconnect the hybrid battery. I found it to be fairly simple. He said, you should be able to dolly tow the car without disconnecting the battery as the rear wheels have nothing to do with charging the battery.