Estelle Parsons via venue addres?

[librarian]

Can I please get Via venue address for Estelle Parsons. I live in Chicago, IL She is currently touring around the USA "August:Osage County". Is that a good idea to send her letter, considering that she is running here and there all over the country? How do I send my envelope? what do I write on it, so it won't be lost. Please help!
I live in Chicago. Next scheduled tour for her are the following:
http://www.augustonbroadway.com/tour.php

2/23/10 - 2/28/10
Des Moines, IA: Civic Center of Greater Des Moines
3/2/10 - 3/14/10
St. Louis, MO: Fox Theatre
3/16/10 - 3/21/10
St. Paul, MN: The Ordway
4/6/10 - 4/11/10
Pittsburgh, PA: Benedum Center
4/13/10 - 4/25/10
Cleveland, OH: Playhouse Square

4/27/10 - 5/2/10
Philadelphia, PA: Forrest Theatre
5/4/10 - 5/16/10
Boston, MA: Colonial Theatre