i'm in exactly your kind of position. my flat is a bit of an open plan one and as such, my room is a natural place to poke your head into for a goosey. my cab is a walkin cupboard that is permenently under the guise of "box storage" to minimize ANY reason to op[en the door, i also have a fairly similar cupboard on the other side of the room so i keep that nice and open to try and minimize any suspision. if i have friends over, or oh i don't know my anti-pot flatmate, i just whack the fan off, and now have it in a position where the only need to turn the light out would be if there was a lass in my bed, but i think she'd be distracted from the cracks of light around the door
i say turn the power off and leave the tent be. open one zip slightly and have a jumper sleeve poking thorugh it, or just hook a handful of t-shirts on coathangers over the top of the front etc, you sould be able to pull it off fairly easily i'd have thought. i used to have all my nutes, ballast etc everything on the floor next to the cab door, so the moment i knew of comany, i'd just throw some obstacles in front of em and smiled through
oh, and inn terms of smell, i'll assume they know you smoke, so just keep a big bag of bud out in the open to place the blame on (what i do, i gave up on hiding my glass jars of weed, tell my flatmate i just buy in bulk to save money, and use that to be the scape goat for any smells that escape (which before i got a carbon filter was ALOT!)