Blimey - never heard of that one, but just googled it (what did we do before t'internet?) so I cant say anything about its usefulness or not, but I am of the thinking that whatever works can be a useful thing. I did see the 'tribe' documentary years back though (its all coming back to me) so reckon it might be a 'use with caution' technique - my feeling is not something to try alone/without support.. will you have help on the journey?
Best wishes
Sal