Exeter has hills enough to hold a ski slope, and the rise at Yawgoo Valley sets the tone for winter here: snow comes early to the high ground and leaves it last. RIYardworks takes the year in two halves, plowing and clearing while the cold holds, then mowing, trimming and cleaning up once the ground softens. Summer lawns in this town are broad and edged by woods, and they need a steady hand to keep the lines honest. Winter driveways are long and often steep, and they need to be opened before anyone tries them. Doing both means seeing the same properties in every kind of weather they get, which is its own quiet reward.