Try any of the state gamelands in Bedford, Cambria or Somerset counties. When I still lived in PA, I had gamelands 26 twenty minutes away. You can often find some thick, nasty stuff with very little effort. Depending on the year (let me emphasize this), the land can be full of a decent number of grouse. One other good thing, there is no pressure on grouse, and there is a pile of public hand that's accessible to hunt.