tagging the entrance road to the school as access=no seems extreme to me. That means no one can use the road. So delivers, parents, and staff can not use the road. How about tagging it as ownership=private. If you have no trespassing signs at the entrance to the road, then adding access=private makes more sense. I did look at Bing street view imagery and did not see any no trespassing type of sign. https://www.bing.com/maps/?cp=48.412796%7E-122.288132&lvl=19.8&pi=-13&style=x&dir=114.9