you could use knee pads, I tape my backing down to my carpet& sometimes i use big safety pins to make it tight. then i spray the backing lightly then i put my batting down spray a little at a time unfold the batting as you go.then i spray my battering & unfold my top & pin half to carpet & spray other half & pin to carpet. I do this for all my quilts from small to king & dont have any problems getting wrinkles on the back you can see my quilts here I post front & back .