What is the name of this movie ?

as a kid me and my sister remember watching a horror movie about some kids that were in a ski lodge or something like that up in the mountains, there were like 4 or 6 of them and the oldest one, a girl was all ways dressed as a nun and they would kill all the adults in gruesome ways, like one of the adults got piranha's thrown in the tub, and another one got all for limbs caught in bear traps and then set on fire, we cant remember the name of the movie or who was in it.