I second the use of a business conference room, a church basement or other location.
I used to have a large table that was great, a crib quilt fit on it, and I let gravity help me keep the fabric taut, along with a few cans of spaghetti sauce! Don't have that table any more.
I do most of my layout on my queen sized bed which makes doing a queen sized quilt rather challenging. I have rolls of heavy craft paper that I cover the bed, it help firm the surface, protect it from spray baste and provide a surface I can feel/use for safety pins. But the height is really hard on me and even with spray baste, I am "crunkled" by the end of the process.