My friends and I have smoked numerous times in the car. When we moved to edmond from tulsa (OKlahoma) we were making a bunch of trips back and forth. The trips lasted about an hour and a half, so... perfect. The biggest piece of advise I can give is, make sure you have a big ash tray underneath your bowl, wide with big walls. Have someone hold it and maintain the coals, it'll works like a dream. My preferred way to drive for sure.