Last year I switched from spreading the layers out on the floor and spray basting the whole thing to a modified Sharon Schamber method and pin basting (also a Jeanne Harrison method -
Jeanne Harrison quilt basting the easy way ).
If you have an area that can handle the length of a piece of molding (I use 1/2" by 1 1/2" by 10 ft long boards), roll each layer up on a board, then lay them on top of each other and unroll a foot or so at a time and baste as you go. The video explains it better. I am able to set my ironing board next to my cutting table (the long way) and have the rolls at comfortable standing height. I used curved safety pins and the Kwik Klip tool (and Quilter's Delight pin covers) and it goes fairly quickly.