My log home is western red cedar. When I was building it, I spent a great deal of time with a 9" grinder and sanding disk profiling the door and window openings, the flats on the logs for receptacles and switches and misc other areas. It took me one time (the first time) of doing this without a dusk mask to realize why bugs don't like cedar. I got horribly sick. So ya, listen to Bob.... Cedar dust is pretty bad stuff to be inhaling. You can probably get away without a mask for rough cutting a few boards, but definitely do not try to sand the stuff without a mask.
