Yeah man a carbon filter and a solid fan/blower is really all you need, I cant smell a damn thing right outside of my grow room with .5 lb + of bud flowering on the other side of some drywall and sheets bro, you'll be good. The most of the stealth factor come from people wondering why something is blocked off or illuminated. Cover any light leaks, and make it out of the way, put a shelf or something distracting infront of it, and play some music to cover up fan noise, and as long as you dont have a really nosey fuck near by, your good to go... but any people living in any dwelling you choose to make a grow room in, will eventually find out about growing, its fact... lol at least anything substantial enough to make it worth your time and money at least...
Best thing to do in that situation (young children dont care) older ones and teens will ask questions, you can either tell them like it is, or make some bullshit up. For adults, unless its a short term house guest, your fucked. you'll have to inform them and get consent to do so... They WILL find out eventually, even if your really careful, life happens. If you do try and hide it from any adults, and they find out on accident, results may get bad. luckily you'll have a bit of time after they call the police (if they do, they suck at life) to chop every god damn thing down throw it in a bag, and leave nothing but dirt and lights n shit there, (nothing weed related, not even leaves) and haul some ass and dump it... for this reason i recommend being clendly and keeping trimmings and debris contained in a singular large trash bag.