Hi, I have a large extendable dining table but do not want to damage it so my lovely husband cut a piece of ply wood to fit.I tuck the edges of the backing fabric under it to hold the fabric tight. you can also spray bast then or pin and tack.Something else to do is to use trestle tables at your church or community centre, a plus to that is that there is often someone to give you a hand with the tacking !I too find dealing with a large quilt almost impossible,I am waiting to see if surgery can help with spinal problems.I now make prem quilts to keep my love going,I dread the fact that I may not be able to continue with this lovely craft. Love to all and thank you all for great ideas that just keep coming.Love Letty