Civil Air Patrol, at least for the search phase during daylight hours.
As far as the Air Force being tasked with SAR 50 miles inland, they may have the mission but they do not have the resources to do that; that tasks is much better carried out by local Airborne Law Enforcement Agencies with FLIR equipped helicopters.
Thinking about it, that's a gaping whole in the system.
More job openings for the National Guard and their UH-72s?