ask the rangers on duty @ Painted Desert about some of the sites. Most of them are very cool and after they figure out you have experience, (not a touron in other words) they are likely to clue you in on some of the best petroglyph sites. I found a near complete ladel and dozens of interesting items about .25 mile off the road. Also, a phytosaur (sp?) tooth and some petrified pinecones which are very rare, i have heard.