We describe our own experience of linguist-community collaboration over the last ten years in our Chatino Language Documentation Project, focused on the Chatino languages (Otomanguean; Oaxaca, Mexico). We relate episodes in the emergence and evolution of the collaboration between ourselves, and of the collaboration among ourselves and the Chatino communities with which we have worked. Our experience has several special features. First, our own collaboration began as native Chatino-speaking Ph.D. student and her teacher in a program focused on training speakers of Latin American indigenous languages in linguistics and anthropology, and developed into a larger collaboration among students and faculty where the student had a major leadership role. Second, our approach was documentary-descriptive and comparative, but it was also socially engaged or "activist," in that we sought to promote interest, awareness, and respect for the Chatino languages, to teach and support Chatino literacy, and to preserve and offer access to spoken Chatino, especially traditional verbal art. Our approach had synergies with local interests in writing and in honoring traditional speech ways, but it also led to conflicts over our roles as social actors, and the traditionally activist roles of indigenous teachers. Third, we experienced plasticity in the collaborative roles we played. Between ourselves, we were student and teacher, but also initiator and follower as we became engaged in revitalization. At the same time, the native speaker linguist found herself occupying a range of positions along a continuum from "insider" to "outsider" respect to her own community.