In Yuma County along the Colorado River, you will find some nice ones, but they are quite elusive. Also east of Yuma, near Tacna and Wellton along the Gila River. These are all areas that I hunted as a kid and growing up for 30 years. Also north of Gila Bend along the Gila River there use to be quite a few. Good luck...also try the Arizona Strip in Northwestern Arizona.