The factors that go into charging for a rescue are murky at best. The brawls, I've seen discussing said issues online, has been amusing. I have held the opinion that you should either charge for all rescues, or none of them. Arguing about negligence is like arguing about how nice it is outside. Hundreds of opinions, all based on our own perspective. Like in this case. I do not think he should be charged, he made a call and to his knowledge, it was a done deal. If you get rescued, you used a service you should pay for that service. If your that concerned about being charged, do what I do, don't leave your plans with anyone. Then you can relax and go about your self rescue and have all the time in the world to get out.