Shakes,
My father-in-law was a lifelong carpenter and was covered every day in sawdust, mainly southern pine, fir, hemlock, spruce that all our dimensional lumber is made out of.
As he got older and worked on some large projects with western cedar he had to wear a dust mask and keep his arms washed off frequently during the day to keep from breaking out. He got down the first time so bad he had to take a week off work and go see a doc to get his sinuses cleaned out so he could breathe again. Main problem for him was the amount of exposure, heat, and sweaty skin that caused what cedar dust was around to stick to him like glue.
Wear long sleeves a dust mask and only work a dozen or two at a time and you will be fine bud.