History of Training Camps?

Sorry if this has been discussed before, but what is the history behind MMA "camps" before a fight? Where did the tradition start where you bring in partners to mimic your opponents strengths and put together a game plan?

Im assuming its been used in boxing for a long time, as a way to prepare for taller guys etc

JoseyWales - Im assuming its been used in boxing for a long time, as a way to prepare for taller guys etc

Thanks. I was wondering if the tradition came from boxing or not. It makes sense that it might have.