How do I map skin and hair textures for CC?

Hi. You can put the uvs of the tail that are meant to match the skin on the face or the neck area of the uv map (not a forehead(shadow from the hair), cheeks (blush), jawline and chin (facial hair), nose maybe ). As for the hair part of the tail, you could try eyebrows, but it will be of poor quality.
You cannot put it in the hair area because the hair uvs are always differently arranged