Jeffrey, I have attended six of Chuck's workshops and will be going to Zion in November, my second time there. I assume that the Zion workshop is the one you have signed up for. I don't think you will be dissapointed. Chuck is a very good photographer and instructor and the participants in the workshops are folks with a common love of photography.
The days are full, usually beginning with the morning light and ending late at night with dinners, presentations and lectures.
There are usually several "repeat" attendees at Chuck's workshops and that says a lot about the effort he puts into making it a worthwhile experience.