It would also help if you made several "frames" for the signature areas. People don't seem to know how to follow directions.
You might also want to assign someone at the table where you want to collect the signatures to help the guests sign their names.
I did a signature quilt collecting signatures of some really smart women. I had to have a few sign a second time with guidance. Brilliant career women couldn't follow verbal and written instructions ... but needed on on one help. Go figure.
ali