There are four members in my family, including two high school students, and We are such a beginners. What package should I use to make One night and two days trip?

Yeah, what Matt D said. They sell Powder Packs and, if you need lessons, they offer 1-2-3-free lesson packages. All lessons you buy include rentals and lift tickets.

Do you take lessons? They have 123-free programs which offers a great deal for lesson takers. Otherwise booking online offers the best deal. They also have 4-day or 4-night powder packs.