I agree...you need to use a cutaway stabilizer, 2 layers if the design is dense. I'd also lossen the pull comp so the stitches don't pull too tight. If your machine is set for the pull comp say at 2-2.5, raise it to 4.0. As far as hooping...I hardly hoop anything anymore. I would hoop the cutaway (both layers if using 2), spray it with basting spray, lay your apron on top & use the machines basting stitch for the hoop. If your machine has no "hoop basting stitch", then carefully stitch around the inside of the hoop, sort of like free-motion quilting, to hold the apron in place. This should allow the design to stitch out without puckering. You do not want to hoop any fabric tight as a drum because the stitches will cause it to pucker once out of the hoop. When done you will need to rip out the basting stitch before taking the hoop off. Then trim the cutaway.