Sounds to me like you need a more secure location, and NOT less smelly weed.
Try growing other fragrant plants nearby to mask the smell from your herb. It will also provide a camouflage, helping your girls to blend in.
This I would imagine would work well with Indica or mostly Indica strains, as they stay shorter than Sativa plants.
Look into autos too. These are self regulating, and are generally done, seed to harvest in a very short time (8-12 weeks total) depending on the strain.
Good luck.