Glue basting is the only thing I use. I don't spread it over the whole surface. I just squizzle a thin stream in a zig zag motion on the quilt bat and then lay the backing over it and smooth it down. Let it dry and then flip it over and do the same for the front. Never had any problems.
You don't need to think of glue basting as an alternative to spray but rather it is an alternative to pin basting or thread basting. You don't pin or sew everywhere and it works so you don't need to glue everywhere.