Need to/don`t need to or must/mustn`t I am making some sandwiches so you .......... brink any food We`ll also ........... bring some plastic plate

Need to/don`t need to or must/mustn`t I am making some sandwiches so you .......... brink any food We`ll also ........... bring some plastic plates and cups. We`ll have the picnic near the lake so i ........... forget to bring a blanket to sit on. I think the weather will be good tomorrow so we ........... take coats, but we ............ remember sun cream.