When I took classes from Harriet Hargrave she taught us a way to lay out the quilt for basting without a large table. In fact works better to not have a large table (easier on your back). Find the center of all sides of the quilt (and backing and batting too) and put a pin in those places or iron to create fold lines. Then find the centers of all 4 sides of your table and tape a toothpick in those places. You can then place the centers of your quilts (backing first then batting) on the table by matching up your pins or fold lines with the toothpicks. Toothpicks are used because you can feel them under the quilt and you won't have to lift up your quilt to see where the centers of the table are. The quilt and batting will hang over the edges of the table helping keep the quilt top flat. You will start this same process with the quilt backing centered then clamped down all the way around, then the batting then finally the quilt top. Once you have all this area basted you can undo the clamps and move the quilt from side to side to finish up the basting. Harriet's book "Heirloom Machine Quilting" is an incredible reference. Money well spent.