It will stink if you smoke it up then pack up the tent right away. To avoid the smell from staying in there, just open the flaps on the tent and let it air out for a day or so. That will take the smell out.

Having it smell then spraying a spray won't take the smell away. It will just trap it when you close the tent up. Then when you open it, surprise!

Plus who would spray Febreeze when you're out camping? Parents aren't that stupid man, so just air the tent out, or don't smoke it the tent.