WOW! Yes, Bill Hickey's children (whose names I for some crazy reason remember but I don't want to invade their privacy) attended the school (N.E.A.T. back in 1970-not Rivendell, which opened in 1977 or so). The Hickeys were one of the original families in the school. Their kids were some years younger than I. Bill Hickey and his partner were the only truly "60s" -ish seeming parents in the whole lot. All the other parents were squares.
While I never visited them, I recall they lived very near the school.
The person Susan you referred to I do not recall (unless Bill's then-partner was named Susan...memory fails me there).