cedar bark was pounded and woven into clothes by PacNW Natives, I see no reason why it could not be used for its fibers in any application you could employ it; cordage, Clothing.
Cedar boughs burn particularly fast, smoky, and hot so they would be useful signaling for assistance.
Cedar also appears to be high in tannin, judging by the way old growth stands color creekwater. The uses of tannic acid are numerous- there are astringent qualities, it has also been employed in the curing of hides. That's all off the top of my head.