When I flew with Alpine Helicopter out of Golden, they requested a list of credit card numbers from the group before they lifted off, and seemed to want to make it clear that they would be heavily used if they had to come get us. I guess that's not definitive, but I was glad to have amer. alpine club insurance. Maybe it was more of a bluffing statement than anything, but I didn't want to risk it! It may also be that the trip was sponsored through the calgary section of acc (this was to the Clemenceau area) and a friend and I were hitching a ride. Maybe it's different elsewhere? Seemed much more likely to be billed than in the states. Though it's not like there's a lot of remote terrain like that in the lower 48