We've had Thanksgiving at my sister's house the past few years. We sit outside, at two long tables connected in an "L" shape. I always love her very sweet and fun ideas for table decor. (I love all of my sister's decorating.)
Last year she had the kids make the placecards a few days ahead of time. They made turkeys with an inkpad and their fingers and thumbs and some googly eyes.
My nephew decided his would be a cyclops. :)
She used family photos to decorate little pumpkins, and there were pots of mums. It was so personal and nice.