Heck we don,t have any grouse anymore in Ohio. Well just say lucky to hear one drumming in the spring I heard 2 different birds this spring and I could not believe my ears. We have woodcock still but when out hunting woodcock if we point grouse an fly him no one shots I can remember 50 flush days in Ohio back in the late 70 Early to mid 80 the last grouse I took here in Ohio was back in 2001 we flew 6 birds I took 2 and dad killed 1 this was a spot next to the Ohio river which was no more than a 2 hour hunt went back in the the following year flew 2. Went further down the road flew 3 wild flushes no birds were taken that year and I gave not taken a grouse since did fly one over point woodcock hunting last year just watched him clear the tree tops and set his wings.
Say if your in NH, VT has a nice population of grouse.