I like to baste stitch, just outside to the right of the 1/4" seam, around my quilt before adding the binding. It is so much easier to keep everything in place and not have to worry about it pleating on the back.
Also,When I trim the extra bat and backing off I leave about two inches of bat and backing around the edge. It is an extra step but I think it is worth it. Leaving that little bit extra around the edge gives the feed dogs something to grip while sewing the binding on and helps prevent the fabric from wondering. I go back and trim it after the binding is sewn on. Just a little tip to try.
peace