We're still quarantining overnight.  At shift end, we empty our outdoor drop box into the lobby drop box so that we know no new items have been added and then at the start of the next shift we check them all in.  We've temporarily increased the number of DVDs that our patrons can borrow at once to accommodate the hold period.  It's working well for us.  Much of the science assumed that 'other mitigation efforts' were still in place.  Most of those other efforts have been ended in the last month, so that assumption no longer holds.  We're comfortable with the overnight now.  The REALM results strongly indicated a significant decrease between inoculation and T0 or T1, at least in ambient or warmer conditions.

Best wishes!