Don't know where you are at but, personally I can vouch for the counties of Inyo and Mono. Say, from Lone Pine up Highway 395 all the way to Bridgeport.
That is a good area. Also, If you go just a little North of Bridgeport, (Sweetwater Cutoff Road) you will evantually get to the Sweetwater Ranch on the left side of the Highway. You can't miss it, it is a big outfit. From there look in a Westerly direction and you will see a mountain range that is known as, "Silverado area". Tremendous amount of arrowheads and other stuff on that mountain range. Good deer hunting too.