To respond to your concern about group therapy where you are, I think Meeks really tried to emphasis full disclosure, openness. Creating rules and boundaries were important but also expecting teens, for example to share with the group when they had outside conversations. Additionally, if the therapist were to meet with a parent they would forewarn the teen. I think a group could be a very supportive force for any population and the differing individual goals could help the group become more focused and cohesive despite differences.
Good luck!
Good luck!