I have two suggestions: First, I use spray adhesive. Tape down the backing, spray the backing and carefully spread the batting down. Then spray the batting and put down the top. Then I pin baste the whole thing and get started. The second idea I actually saw a demonstration video online. The woman uses 2 lengths of 2 x 4s. She wraps the backing around one, puts the batting down and puts down the top that is similarly wrapped around the board. She unwinds the backing, pulls down the batting and unrolls the top. She she thread bastes what she has done. She keeps repeating until finished. I'll bet that was clear as mud, but the video is very explanatory.