I have never hunted the Nile for the sole purpose of grouse but I have heard that the Devil's Table is a really good place. Its off FR 1500, just south of Rattlesnake Creek. You cant really miss it, looks just as it sounds, its a big flat grass plateau with rock slides/crags on all sides. One of these days ill take my pup down there and give it a shot. But until then, good luck. If you dont want to give that a shot, you cant go wrong with any closed off/burmed road, especially if its got some gravel in it and a strip of grass going up the center. Inside turns in them are especially good because water isnt too far usually.