At the very least a particle mask. That cedar will make your throat and sinuses feel raw.
He that would make his own liberty secure, must guard even his enemy from oppression; for if he violates this duty, he establishes a precedent that will reach to himself.
Thomas Paine
Not so much toxic as irritating. And can cause allergic reactions in hyper sensitive folks as well as asthmatics. A good mask or respirator will suffice. Dust in that volume is not good for your lungs.