I ski approximately 60 days/season in Sun Valley, ID and McCall, ID and have developed knee pain. Am I a candidate for PRP (Platelet-Rich Plasma)?

You may be a good candidate for Regenerative Medicine, either PRP or Stem Cell. Stem cells procedures are done primarily for osteoarthritis of the larger joints-knees, hips, shoulders. Whereas PRP is more typically done for a partial tear or sprain of tendon/ligaments. However, PRP can also be done for osteoarthritis (and degenerative discs of the spine).