Yeah sometimes bands get into contracts with festivals and things.
In the UK I know some bands can't tour in the weeks before or after Download Festival because they're exclusive to the festival. Which makes sense because it makes people go to the festivals.
But with such a lack of dates I'm expecting an early 2013 run of dates to make up for that. That wouldn't surprise me anyway.
He is playing in AZ, close enough. He does get around when he tours a good amount usually, so just wait.
Hopefully the next time he does any rounds on the west coast it'll be for a book signing tour.