This is probably not the forum likely to offer a positive suggestion about any therapeutic school, program, whatever other than a fully-licensed psychiatric hospital or local outpatient program! However, Sagewalk is one of a number of "wilderness" programs that can accomlish many good things for participants. I might recomend it under some circumstances, although I'd probably lean toward other places first.
Actually, I'd not recommend any particular program without knowing more. Certainly, first steps ought to include local counselling, probably including serious family therapy and a cooperating family. While your son's "choices" may be troubling to you, there may be something you are doing (without realizing it) that contributes to his making of poor choices.
You might also consider a family vacation - perhaps a camping trip - after a few counselling/therapy sessions, depending on how things progress. Finally, if you do decide that a wilderness program is appropriate (and sometimes it is), you also might need to prepare for something further. It depends on a lot of factors.