Four days, three nights. Cool, fun and just a bit cold.
Also way too many pictures to count (my advice is before you take a picture, stop and really wonder if it is Instagram or Facebook worthy because I am in the midst of scrolling through more or less 500 pictures realizing that most are the same thing just with a slightly different angle or twist). Also bring a warm sleeping bag and some good socks for the cold (you can mail me cookies as a thank you later).
It really was an experience of a lifetime but I feel someone should warn you, the bathrooms may cause you to lose your sense of smell.