My sister played in the 70s in OK, went to college, became a PE teacher/coach, coached the 6-on-6 game in OK in the late 70s and early 80s. She decided she really wanted to get into the full-court game as was being played elsewhere so she moved to TX. She only coached another 3-4 years and left the profession and teaching. She liked the game but the full-court game made the coaching more of a man’s profession with the attendant politics.
The girls played 6/6 bb when I was in high school in Arkansas. Graduated in 1963. As I recall, most of the action was at the mid court stripe, strategy being to get the ball across to ones offensive players. I don’t recall when Arkansas switched to the 5/5 game though as after graduation I was preoccupied with other distractions, i.e. College, army, work....