Try Elmers Washable School Glue to sandwich your quilts! It is inexpensive and secures the layers so that they do not shift. There is a tutorial on how to use the glue here on the QB.
I started out with basting pins in my early quilting life but hated how i had to remove them when quilting on my sewing machine - so I have tried all the other mentioned methods of sandwiching quilts and now use the folowwing three methods.
1) Elmers Washable School Glue
2) 505 in the red can (it is the cheapest)
3) Hobbs 80/20 fusible batting ( I buy 4 or 5 when on sale)
Good luck with your projects!