We will be in Las Vegas for two weeks. In order to take advantage of a $30.00 off weekly car rental coupon, I am considering a back-to-back car rental. Has anyone ever tried this? Is it worth the extra $30.00 saving to take the car back, turn it in, and then go to the rental desk and pick up next week's car? Or will the car rental company catch this maneuver and cancel the reservation.