I'd like to ask the reverse of this situation:
Say I am skiing along minding my own business and get run into by a snowboarder, who then runs into a tree injuring himself. I was in the right, he in the wrong. He is injured. His friends collect around us and insist that I "cut him off" and caused the accident. They all insist on knowing my ID.
Do I give it to them? (My answer: No)
Ski patrol shows up, do I give it to them? (My answer: No)
The police show up, am I obligated to give it to them? (In most states, No. Not unless you are arrested.)
I don't want anything to do with a lawsuit, it costs too much money. The best way to avoid one is to not be known......
In this scenario, odds are there would be at least two to three POV cameras recording the entire thing, And, even if 100% in the right, refusal to cooperate with resort staff and especially law enforcement is the kiss of death in court. Demand that their GoPro cameras remain untouched and preserved for LEO to get copies of the footage. If you're in the right, you will prevail.