Humidor Build Questions

[ksknnr]

So I have decided to take on a winter project, and I just had a few questions for the experts. I picked up a good size cabinet at a local estate sale. Its pretty cool, it looks like a grandfather Clock, but the whole thing besides the clock on top is a cabinet with 4 shelves. I think it may be oak, but it is painted black, so I may strip it down to bare wood. It is a pretty solid piece.
I was planning on buying or having made some cedar drawers. Is it absolutely neccesary to line the inside with cedar before I install the drawers?
Also, any suggestions on what type of humidty device would work better? beads or a humidifer?
The inside dimensions are roughly 48" High x 12" wide x 12" deep

Any help would be great, I will start posting pics when the project gets started.