(Inspired by this answer.)
The gemarah in krisus [8b-9a] discusses the requirement for a convert to bring a korban (sacrifice) to enter into the community. If this is the case, how could Rus have converted in Moav or along the road to eretz yisroel (as is discussed by the commentaries)? Wouldn't she have needed to wait until she arrived at the mishkan (Tabernacle) in eretz yisroel to bring her korban and complete the geirus (formal conversion) process?