This article aims to examine our positioning process as ethnographers in the field. Drawing on my fieldwork in Israel among non-Jewish undocumented migrants who initially were extremely reluctant to cooperate with my research, I highlight the power of informants to largely dictate the conditions for an engagement with an anthropologist, and define the parameters of proximity. This power of informants, or more generally of the ‘field’, brings to the fore the existing tension between our strategic design of methods and their tactical implementation during fieldwork. By applying Bourdieu's conceptualisation of a ‘field’, I seek to emphasize both the relational configuration and habitus of actors, as generative elements that shape our interactions and position in the field. I particularly focus on our ingrained dispositions that can sometimes significantly direct our tactical management of crucial situations in the field, and shape our sense of ethics. Echoing Marcus (1995) and following Bourdieu's insights, I finally suggest that we should try to exercise self-reflexivity as an element of method before and throughout our fieldwork, rather than use it retrospectively to account for our distinctive involvement and the ways it might have impacted our informants and collected data.