I would say sleeping in the car is obviously not the brightest idea. Being in school and a lacrosse player for the university I have my big duffle bag and sticks to put in the car. I am constantly amazed at how much I can fit into the trunk. Its deceptive. For a car this size you could even call it cavernous. It has such a deep base. And when you make use of the passenger seat, the cargo room is really astounding.