Wow..what a place. Went this past spring and the entry sign says it all "You may die here today".. this is a serious place for people with skills. Keep in mind you must have a beacon, shovel and pole to be here, you can rent all these. My 1st time i paid the $100 for a guided day ticket and it was well worth it. With the guide you are able to get to terrain the other non-guided people cant access (legally). And yes they will arrest you if you go out of bounds! If you cant handle double diamonds dont even think of going there.. its insane and I love it!