No. If you are Car Camping, you may sleep in your car, on your car, next to your car or in many other creative sleeping places as long as they follow all camping rules and are within the lines of your allotted camping spot. If you are tent camping, you may sleep on the ground in your spot without a tent if you really want to. If you're sleeping in your car, keep in mind that it can get very hot as soon as the sun comes up. Works best with a pickup truck bed or larger car such as a hatchback or SUV that's easier to ventilate. You will want to cover the windows and possibly put a canopy over the car.