Re: Category help
I think, no. The permission tiki_p_view_categories gives only the right to see the categories itself, but when an anonymopus visitor should be able to see e.g. the categorized wiki page, you must give him the permission tiki_p_view_categorized.
If you apply the permission for Top::Policy using "give permission to this category and all subcategories", then you give it until Approved, Draft and Pending. If you don't want to do so, choose the other button "permission only for this category".