I think I'm rather unconventional when it comes to the quilting part from what I gather from my quilting friends. I never pin the entire quilt. I only pin (using straight pins) the seam (if doing SID) or the block/area (if doing FM) in question. I press/iron after every seam/block of stitching and then smooth, smooth, smooth before pinning the next section/seam. It may be a bit more time consuming and labor intensive, but it works for me!