This exhibit that the Cushing Library put together should be of help to you young'uns.
http://libraryasp.tamu.edu/cushing/onlinex/womenhistory/There were plenty of girls (still <1000 out of 14,000) attending classes at A&M pre-1970, and there were many more in the summer, when teachers flocked in to work on Masters degrees, and they opened Fowler Hall for women (....only nuns lived on the ground floor)
It was a little hard for them since there were so few facilities on campus for them. Ladies restrooms were generally reserved for faculty or staff (except at the MSC), and girls in PE classes had to use the Visitors Dressing room at Jolly Rollie (Woe to you if A&M had a game scheduled that night and the visiting team showed up while you were in your class!) Most maintained pretty low profiles, and because of some hostility, let their grades get the last laugh. The whole school wasn't more than 15,000, so they didn't need the massive apartment complexes you have today.
Earl Rudder was their greatest advocate (as Sully Ross and President Bizzell had been before him), but he died suddenly in spring of 1970, but probably his greatest legacy to A&M was his getting women solidly ensconced for good on campus.
The Anti-Women-Aggie Die-Hards kept up their hope that it would all be reversed, until Krueger Dunn was opened in Fall of 1972, the Beginning of the End.