I don't know those areas, but I do know some grouse hunting tips. They will hang out around logging roads to get gravel for their gizzards. I prefer roads that are somewhat grown over but maintained roads are good too. The best shoots I've had have been when the weather clears after a period of rain. They either hold in cover during rain and then come out, or they come out into the open to dry off, I'm not sure which. Also, if it's been dry, they'll hang around water which can be creeks or ditches.
The few times I've limited have been on the first clear day after a rainy pattern.