If they are only visiting for a short time, your golden. Clean up the apt. to the point you could pass a boot camp inspection. Everything in it's place. 1 bedroom apt? clean your bedroom, fold the clothes, clean the kitchen, vacuum the place with carpet fresh. Buy some scented candles,10 of them. Make the place smell like a Da Nang whorehouse. They might think your gay, but who cares? Turn off all the equipment just before they arrive, shut the door. Your girls will be fine for a few hours. Hope for the best. My Dad found my grow in my first apt. He said they look great, be careful. He was cool about the weed. He did'nt smoke. He wsn't a hater. You'll be fine. Good luck. Let us know how it turns out.