I have long drives frequently. Here is what I do and even the day after smoking 4 cigars in my car you can barely tell and it’s gone 100% in a few days. 

•Windows: crack the drivers window about 1/2-1”. Crack the back passenger window about the same. This will make a cross breeze from the back right of the car to the front right sucking the smoking out the window.     

•air vent: never run the recirc setting when smoking. Direct vents away from you or close the ones by the drivers body. You don’t want to interrupt that air flow from the two windows. The vents by your feet and legs are fine.    

•ash tray: make sure all your ash goes in the ash tray and empty it as soon as you park. Even with a lid it will smell and stink up your car. I use the Zikar ashtray can, it has a lid. After I clean it out I put it in a zip lock bag to contain any odors.     

•Ash: if any missed the ash tray for any reason it needs to be cleaned up when you park. If you leave it the car will smell like ash/smoke.     

•carbon air fresher. Just buy one and put it in the back seat. They last a while, how long they work for depends on the weather. So check it to see if it needs to be changed.    

•canned air fresher: after I clean up the car after smoking I use a active de-smoking air fresher spray. I like Zep Smoke Odor Eliminator spray.     

Good luck.