No, not a “source” per se… just a “common sense” approach.
I find it difficult to believe that a community of transients can truly be considered a community.
In short, it seems logical to me that if reading the Torah is a communal obligation, then one should listen to the Parsha that is being lained in the community. Whether or not there is an obligation to hear every Parsha is a different (albeit related) question.
The Wolf