If you live in a decent climate and have access to a window, I'd pick that for sure. Pick one of the tent holes and run your exhaust line through. However, pumping recycled air back into the room and subsequently back in your tent from your intake may not be ideal for you... If the weather is not good where you are or if it will affect your tent environmental parameters, I would just exhaust into the room around the grow tent, but you will need a carbon filter for either application. If you don't want to advertise the smell, venting outside, you're going to need it. If you choose to vent into the room you will probably still want one. I love my weed and the smells, but it permeates into fabrics and it will never, go, away. LOL
Hope this helped man, good luck on your setupš