There are a number of people in your area here, and they seem active. Probably just nothing much going on in the summer... I've got some amazing petroglyph pictures from my last trip out your way, from a park that was going to be a state park but was not yet at the time. The ranger allowed me to wander at will and I was able to get access that no one was going to be able to get once the park became official. There are some absolutely amazing locations out there - I'd love to get back sometime.