Thanks @guoguo0127 You are right of course.
Last year it was University of Colorado, Colorado Springs Center for the Arts.
The Composers Conference (formerly Wellesley Composers Conference, then at Brandeis then Avaloch Farm in NH) also keeps moving around. Not for high schoolers though.
Probably good to check Composers Site and the Walden resource list for up to date info rather than old-timers like me!