If you have not seen these already, here are a couple of interesting articles about SAR cost reimbursement policies.
https://www.outsideonline.com/1986496/s ... ot-exactly
http://adventure.howstuffworks.com/pay- ... rescue.htm
The second article describes cases in which people have refused SAR services to avoid the costs. This appears to be the main reason states and other jurisdictions generally do not seek reimbursement from the people they rescue.
I suspect that avoidance of rescue costs is an important consideration in Claremont.
I don't have the impression that anyone is anxious to close trails. Overall, I think the public resists trail closures and charging for rescues inspite of the high cost of reckless adventure and nonreckless accidents.