Bring waterproof: rain jacket, pant and shoes. Gloves, hat, and long underwear. Layer poly, knit or wool next to your skin. Follow with warmth and then rain protection.
Jean/pants/, long sleeve/short sleeve shirts. Sweater or fleece too. Some people bring shorts and a swimsuit. Don't forget something for dressy nights if you wish to eat in the main dining rooms. Nice pants, top, or dress. Flip flops and another shoe for day/evening. Can bring dressy shoe if want.