House was charming and fit our family of 5 small children without a problem. It really felt "out of the way," which is what we were looking for, but it also had a gas stove and all the comforts a family would want. Nearest grocery store was about 30 minutes away in Saranac Lake, which was fine for us, and there are plenty of activities in town there and the vicinity. Communication with host was excellent; Eric really goes out of his way to make sure you have everything you need to get there and enjoy your stay, and is a great resource to learn what hikes and activities are in the area. I recommend planning any hikes or other activities before you arrive, since we did not have cell phone service in the area.
Our stay at Montgomery House was great! Lots of family space. A great kitchen. Lovely 3 sided screened in room. Awesome decks. Chateaugay Lake is, indeed, pristine. With enough planning, the generator supplies more than enough electricity to fill daily needs. In fact, it was nice to have to shut down and read an actual book.
I will say that anyone with little kids or dogs that don't jump off of docks easily, the shoreline is pretty inaccessible.