To be honest, if your parents sleep soundly, you can pull off smoking in your room quite easily. All you need is a fan, some febreeze, and a tiny bit of incense... Just smoke what youre smoking, put the fan in the window run it for a few minutes, take that down burn a teeny bit of incense (like a half inch off of a stick) and then spray some febreeze. shouldnt smell at all in the morning. you do need a towel under the door and in any vents though.