You don't realy need the cedar. If you fill it with boxes then you have all the cedar that you need. I started with an acumonitor, but it tended to bleed humidity from the bottles, so I have switched over to beads. Have never had a problem. Pictures in the link in the signature. If you have questions, let me know if I can help.
Haha, I hope so. The only part I am struggling with so far is finding a local lumber place that sells Spanish cedar.