I use a banquet table and mark the center of the quilt, batting, top as well as centers of the quilt sides. Then I use blue painters tape to secure the layers to the table top. First securing the center section of the quilt with pins or basting spray, then pulling the quilt across the table and re-securing it to baste subsequent sections. Works great, and like you, I detest crawling on the floor. I basted my first 3 quilts on the floor and had such back issues, I either had to find a new way to baste, or give up quilting entirely.
Hope you find a solution that works for you.