Check out the webpage of the Woody Guthrie Foundation - www.woodyguthrie.org . If you then click on Foundation and Archive Projects you will find a description and schedule of the tour.
Having seen the exhibit in NYC I urge everyone to go. The films that were shown as part of the exhibit are astounding. Reading and hearing about Woody's fight with Huntington's Chorea cannot prepare you for the impact of seeing film footage of Woody in his later days as his family visited him in the hospital. This footage has never been shown in public before. I attended an opening and Arlo was there to talk about it. He said that although the footage may be hard to watch, to him and his family they were having a great day with their father.
At the NYC exhibit they also had the original copy of Woody's "This Land is Your Land". Scribbled on notebook paper, it was inspiring to see this "holy grail" of folk music.
I really urge EVERYONE to check out the exhibit if it travels near you. I hope that someday it will find a permanent home.