This article adds a voice from Amazonia to the reflective discussion on documentation projects designed within a "participatory" or "collaborative" paradigm of language research. It offers a critical assessment of one such documentation project carried out from 2007-2011 with the Kotiria and Wa'ikhana (East Tukano) language communities, who live in the remote Vaupés basin of the northwest Amazon. It examines aspects of the four-year project that most approximated the participative ideals that inspired it, including community input throughout all phases of the project, a "team-based" approach grounded in local partnerships, and efforts to establish a more equitable division of power and responsibility, as well as greater self-determination in the organization of documentation activities. It also points out some of the difficulties encountered along the way and raises questions related to expectations, unforeseen consequences, and sustainability, questions that still remain to be answered.