A great casual Thanksgiving outfit is a tunic, some leggings or jeans, and some tall boots. Dress it up a little by adding a necklace and/or some statement earrings.
Another option is just wearing a cozy cardigan with a top and bottoms. You could do a skirt, cami, and booties. You could dress it down with some jeans or leggings and a tee or thermal top.
If you tend to go dressier with your Thanksgiving outfit, this dress is a great option. It would be cute with booties and some statement earrings to make it a little dressier. Dress it down with a denim jacket.