This paper highlights the role of speech community members on a series of interconnected projects to document, study and maintain Kokama, a deeply endangered language from the Peruvian Amazon. The remaining fluent speakers of the language are mostly older than 60 years of age, are spread out across various small villages, and speak the language in very restricted situations. The aim of this paper is twofold. First, it demonstrates with concrete examples that outcomes of projects implemented in collaboration with speakers yield more broadly useful outcomes than those conducted by a linguist working alone. Second, it underscores the significance of documenting language interaction among different types of speakers in accordance with the view that language preservation is not only about promoting a linguistic code, but also includes documenting communicative practices. The projects reported here can contribute to the development of fieldwork methodologies to work with a range of speakers. The involvement of community members has been crucial for the design of culturally relevant strategies to assess fluency in Kokama, for the naturalness and variety within the collected data, and for the documentation of interactional patterns essential for revitalization initiatives. This paper supports the view that language documentation, language preservation, and linguistic research can be complementary endeavors.