Down toward Morgan Creek the hardwoods close overhead and the light on the grass arrives in moving coins, which makes a shaded lawn its own kind of puzzle. Barreras Landscaping & Tree Service takes those yards as seriously as the wide-open ones, mowing to the height the shade wants and keeping the beds and borders sharp underneath the canopy. Chapel Hill is a place of slopes and creek bottoms, and every property here has one corner that drains slow and one that bakes. Working with that instead of against it is the whole craft. What is left behind is a yard that looks tended right up to its last inch, under the trees included.