yekke2 I came here to post another question on emor but just read yours and do you know I thought of the same question over shabbos. I answered it that before matan torah a person was only jewish if their father was, not their mother like nowadays.
The question I wanted to post is on the same topic – Rashi said the Ben Isha Yisraelis had become a ger and that shevet Dan did not let him set up tent among them. I was wondering, where did all the gerim set up their tents? There were many gerim who joined klal yisrael in the midbar. Did they have their own area? And where did the eruv rav have their tents? And when they conquered eretz yisrael, which portion did the gerim get?