Saturday morning around Great Cove sounds like outboards starting and mowers warming up, because Hopatcong takes its weekends seriously. J&C Lawn Services works out ahead of that — cutting, trimming and edging so the yard is finished and quiet before the day really begins. Lots along the water run narrow and long, with a dozen turns around walls, posts and plantings, so mowing here is more steering than driving. Cleanups in spring and fall clear out whatever the oaks and the wind have left behind. A finished lawn on a bright Saturday is a small thing that makes a whole street look better.