Your booking includes expert local guides, kayaks, all necessary entry tickets, safety gear, lunch, and train/motorcoach transportation. You should bring a reusable water bottle, cash for guide gratuities, a credit card if interested in buying something on the train, a photo ID, and a camera. As for clothes, the key to staying warm and comfortable in Alaska is to dress in layers, wearing warm clothes that aren't made of cotton and a water-resistant layer on top. Make sure to bring an extra pair of warm socks, gloves, and a hat.