Outdoorsman is a summary of your skills for surviving in the wild. With it you can harvest fiber from plants, get brahmin hide, and have a higher chance to be able to avoid random encounters. With 100 Outdoorsman you can also get the Ranger perk, which changes any tents made into a Safehouse. The Safehouse is a small metal shack rather than a tent, and it has more chests and the normal crafting table rather than a primitive crafting table. You place a safehouse just as you do a tent, but be sure to get any items of use before moving your current tent if you do so.