Name of some Horror movie in a cabin?

Question

 The movie was in late 90s or early 2000s. About a group of friends who went to some cabin. They ended up killing each other defending their selves. However when the police arrived in the morning they didn't believe the survivors. Or the survivors were hallucinating. What's the name of that movie please? 

Answer 1

doesn't take place in a cabin, but it could be Shrooms

Answer 2

Horror movie in a cabin?

Answer 3

A Smokey Mountain Christmas

(Don't consider that a horror movie? Watch it, it'll change your mind.)