I took a course on machine quilting via Craftsy and the instructor said that it is OK to backstitch carefully when quilting in the ditch for quilts that are going to be put in the washer and dryer. Quilts you are giving for people to use. So I don't do as much burying of threads anymore and I find I can hardly see where I backstitched. On a gallopping horse, no one could see it either. Give yourself a break!