We need to pick up a rental car sometime between 5-5:30pm on a Saturday. Since we are going to Bruny Island, our choices are limited. Bargain Car Rental says they leave the key in a box or something like that. I am worried about the security of doing this, couldn't just anyone walk in and pick up the car? And who would be the witness of any dents & scratches? I usually take photos and make sure their staff is in one of the photos when I pick up a car.