I pin baste most of my quilts. If I'm working on a king size, sometimes I'll thread baste to cut down on the weight. I normally hand quilt but have done some machine quilting on my domestic machine. I use binder clips on my cutting table when basting. Lay out the backing; clip around the table and then repeat the process with batting and top. It takes a few trips around the table but certainly much better than on the floor or anywhere else that I would have to do lots of bending.