How do you pin the layers?

Thanks everyone for your comments. I usually start by pinning farther away, and then when I get ready to do the top stitching..I will add more then..I pin alot of a certain area I am going to be working on. Then take them out as needed. I need them secure as I have to haul the quilt from the kitchen to my sewing room and it makes me feel it will all stay together better if I do that! But the pins are easy to take out so I satisfy my uneasiness with alot of them. I have done them where I hand basted the whole quilt and then STID, but that doesn't do any better than the pins... just don't have to deal with taking them out. Maybe one of these days I will take the chance and try the spray. But for now...I"ll stick with the pins nad take your comments to heart about the puckering issue of the backing