Schools where you absolutely positively need recs

[Sciencewoman]

My HS senior daughter and I went to a University of Michigan admissions event last night. One of the student panelists who is a sorority member told my daughter that she HIGHLY recommends recs, and multiple ones for each chapter are even a good idea. She specifically told us that she had recs for all the chapters when she went through recruitment. She said not everyone will have them, but recruitment draws large numbers of PNMs and it's easy to get lost in the crowd without a rec. I know that when I went through, there were several sororities that pledged a majority of legacies, and this student did join one of the sororities for which she is a legacy.

Since my daughter may go to Michigan next year, I'd be interested in hearing if anyone has any more up-to-date info. on the necessity of recs for this campus?