Is Aragorn as you pictured him?

[Gwathagor]

Actually, a good hunter would clean himself regularly (e.g. bathe in stream) to reduce his scent, thereby making it more difficult for him to be detected by his quarry. The Native Americans, for example, were very conscientious about being clean before they went hunting; the sweat-lodge was part of this process. Aragorn, as we all know, was one of the greatest hunters of that time period in Middle-earth. It is therefore not unreasonable to assume that he would have managed his grime-levels better than he did in the films. He certainly did not have the same gritty, modernist sensibility that Jackson and Co. do, and would have had no qualms about tidying up whenever possible. (In fact, he probably thought: "Gee, I'm an important protagonist here. I should be more presentable before I go into town/meet other important protagonists.") Certainly he wouldn't have been impeccably clean; but you see my point.