Words mean things. I say what I mean. Let me repeat: You don’t need to bring anything means you don’t need to bring anything. And if I did tell you to bring something, bring it in the quantity I said. Really. This doesn’t have to be difficult.
If you’re unfamiliar with Margaret and Helen, they’re two charming old ladies who keep a blog together (although there is a question about whether or not they’re real). Helen has a really amazing Thanksgiving letter she posted for her family on the blog. “Salad at Thanksgiving is a waste of space.” Agreed!