Camping 13 (Source)
From SWGANH Wiki
Mind wounds have always been healable in camps.
Battle fatigue has not. I even asked on the Ranger forum, and it was verified that fatigue is not healed--even in the most advanced of camps.
It's possible that it sneaked in somewhere, but more than likely, your friend misread a number or something. I'll go look at the Ranger forum and see if anyone brought this up lately. If a stealth upgrade has occurred, the rangers would know.