Question: Preferred Walk-on?

I am aware of a recruit, who is All County Defense and been to SMU's Summer FB Camp. Given the volume of tapes and communications flooding the new coaching and recruiting staff, should he pursue or express interest in being a Preferred Walk-on, where he could earn a partial or full scholarship based on making the team and contributing later.
Not familar with the possibility or approach to investigating it. Anyone have comments?
Not familar with the possibility or approach to investigating it. Anyone have comments?