I have seen wooden ware advertised that was made out of cedar. Back in Langstroth's time I bet beekeepers made hives out of what ever was most abundant. Today we know a lot more about the biology of honey bees. Researchers have found that honey bees use pheromones to communicate and I would think the scent of cedar might interfere with that. Jen, I would be curious to know if the cluster refuses to go to the top of the brood box in an effort to avoid the scent of cedar.
If you have a shortage of wood shavings in the future, I would put up a flyer at the big box store or woodworking craft stores offering to buy wood shavings. We have 2 woodworking craft stores within 10 miles of where I live.