Use pins only on corners
I use straight of grain binding folded in half and stitch on the edge using no pins except for the corner to miter the binding. I don't pres my binding in half and find it is much easier to blind stitch it down on the back. Always have good results. When I do use pins on any sewing project I use Superfine Iris, they are expensive but last a very long time. I just bought them from Amazon for $14.95 with free shipping.