"The worst of the puckers probably have about 1/4" excess fabric. There might be 1/2" on one or two of them. I've thought about folding them over, pressing, and then doing a little slip stitch."
I did this once on a quilt that had one large pucker right in the middle of a quilt. I didn't press, just folded and slip stitched. It seemed to work fine although I don't know how it held up over time. You couldn't really even see it after the slip stitching. My customer wasn't very particular this quilt as she felt her piecing wasn't very good anyway. One of her first quilts.