Those "few" were DO's, CO's, and elders. Here are a couple of the answers I've gotten over the years regarding 1975:
Father: Sister D was telling everybody Armageddon was coming in 1975. It was her fault.
Brother: The Society hinted once that it could be 1975, and then the news media got ahold of it and blew it out of proportion.
Son-in-law: Our family came into the truth in 1975 and never heard anything about it (they were getting cold feet by then).
Daughter: It never happened.