Down on Isle of Hope the Skidaway River slides past the bluff twice a day, and by evening the light turns the whole lane the color of oyster shell. S And B Lawn Care Service keeps the yards along these streets in trim — mowing, edging, string trimming, and carrying off what the wind and the Spanish moss leave scattered behind. Shade from the old trees makes the grass grow at different speeds, and it takes real attention to get it all reading as one lawn. The reward is a small thing and a true one: a tidy verge, a swept walk, a house that looks looked-after when you turn into the drive.