Best way to dry in an attic?

Due to my living circumstances, I'm gonna be forced to dry my buds at a friends house when it comes harvest time. He's got some roommates that I don't trust AT ALL and I know they'd probably take some, if not all, of my shit if they were to find it. So we're gonna try to dry it up in his attic to keep suspicion down. What would be the best way to do this? Cardboard box? Fan? I want to conceal them as much as possible just in case anyone else decides to venture up there. Any tips/ideas?

bump bump bump

big tall box with strings run through it. put a small incadescent lite in the bottom and a jar of ona