Washington Atlas and Gazetteer, in the front there is a list of alot of the public hunting areas and the type birds that are found on the grounds. It gives the location of the hunting site and the acreage there. Some places get hit pretty hard if they are near to a bigger city, try hunting durring the week or get as far from the roads as possible. Most of the forest lands that are open to hunting will have grouse on them.
AWS