have you ever slept in your car

I spent a year and a half in college living and sleeping in the backseat of my truck. I was working 10 pm to 6am, doing ROTC at 645-9am, Classes would start at 3pm and go to 9 pm, so I'd sleep in the back seat. Dark tinted windows, 12 volt fans and converter worked great, 12 volt semi heater for the winter months. Them dodges have a lot of room, i'm 6 foot so it was doable. I'd go home on days off and weekends to sleep though