Yes we did bring them a couple of times. It works out fine, we usually bring a blanket and some lawn chairs and sit outside at first, and then we go back in the car. They usually just sleep on the back seat. We just make sure to feed them before we go, and bring water for them to drink. They go for potty breaks in between the movies. The Drive In where we go has some fields around it, so there are grassy areas on the perimeters for them to go. It should be fine, as long as the night is a little cooler, so they don't get hot in the car and overheat.