Build a bucket scrubber to vent the exhaust through. What size fan/filter combo do you have? 4" 6" ? If you have to vent into the room you are growing in, the in-tent carbon filter helps a lot, but I found that the exhausted air still carries a lot of scent. This project will probably run you close to $200 for everything and a couple hours. Far less expensive than being noticed or found out.
A 5-gallon home depot bucket makes a great air cleaner when filled with carbon pellets. The lids fit tightly. A hole saw makes the lid much easier to cut. A 4" PVC pipe needs a 4.25" hole saw. You may still have to sand a bit for nice snug fitment. HomeDepot carries 4" PVC pipe pre cut into 2ft or 3ft sections. A 10ft pipe is $20 and the precut is $20. Go figure. However, not having to cart home and deal with an extra 8ft of pipe might be worth the money. I also highly recommend the carbon impregnanted pet version furnace filters. You will need 2 to be able to wrap the bucket nicely. A 45 degree PVC elbow is nice for attaching the exhaust ducting.
Outer furnace filter wrap:
It is some serious DIY and you need a drill but the result is extremely effective. I didn't take pics of mine but these should give you an idea:
The furnace filter wrapped and ziptied around the outside is necessary to keep all the small pellets contained. You can also put a layer of fine mesh window screen on the inside of the bucket and around the center pipe. You will need quite a bit of carbon pellets to fill the bucket. I get mine from carbonbulksales and its about $140 shipped for 20lbs but it works great. Far less expensive than getting found out.