Welcome to the forums.
Why Stowe instead of any number of other great Eastern hills?
Generally speaking, of course, we want to hold EpicSki Academy events at great ski areas, with outstanding terrain and facilities. The events also have to be held at ski areas that are enlightened enough to welcome us. That, in turn, is largely dependent on the attitude of the local Ski School Director.
Dave Merriam, the SSD at Stowe, is an enlightened progressive guy who not only welcomed us, but (I believe) plans to teach an ETU group. Similarly, Maggie Loring, who has the same job at Snowbird, welcomed us and is taking a group at the EpicSki Academy to be held in Utah next January/February. And Carolyn Fushimi, the Training Director at Brighton (where we held last year's Academy), will be taking a group at Snowbird this year.
Some of the folks who were directly involved in getting the ETU organized might want to chime in here. But I hope that's a start to answering your question.