Dude, i have gone for the past 3 years and it is always ALWAYS the highlight of my entire YEAR.  The people could not be any more chill, there is minimal supervision and you are really left to do your own stuff.  Its super super fun, the lane on the glacier is really fun, and the whole atmosphere is so chill and fun.  If you have any questions I would love to answer them shoot me a PM if you do.