You can also get it from the trainer outside the leatherworker tent in Thunderbluff. I think you can train up to artisan from any skinning trainer. You don't need to find a master, like you do with the manufacturing skills.
i am a lvl 40 pally and i grind and rasie my skinning in stv my skinning is 275 at lvl 40 i just kind every thing possible with out going out of my way just work on skinning while lvling u keep at it