I sometimes feel uncomfortable when people bring gifts, its always appreciated but I don’t want them to feel obligated to do so, and I would like them to feel like they can drop by any time even if they weren’t officially invited. So I would prefer if they happened to bake something or if they made a particular salad that they love and wanted to share.
The best thing I think is a nice card or note to just say that you always enjoy being part of the family and having a good time with them. But that is me. I think you should do what the host appreciates the most. So there is always a bottle of wine to share, a desert, some candy, etc.