To my knowledge, Search and Rescue services are free. The RCMP has jurisdiction for SAR services in areas not supported by a municipal police service. Park Wardens have jurisdiction within the National Parks.
RCMP is assisted by the various search and rescue groups throughout the province. While the RCMP has jurisdiction, the search and rescue groups have the highly trained volunteers that manage the search, and provide the boots on the ground.
If you are looking to volunteer for a great cause, and receive some great training, consider volunteering for your local search and rescue team. The positive feelings you get when a mission is successful, cannot be adequately described in words.
I should add that if you ever find yourself in a predicament, and need assistance, don't hesitate to call for it.
Mr Conservation