Side note: There are volunteer search & rescue groups very similar to CERT, including some with trail-sniffing dogs or on horseback. I was a "ground pounder" myself. Most searches were for Alzheimer's patients, but we had lost hikers & missing kids too.
I highly recommend the Wilderness First Aid (WFA) course offered by the National Outdoors Leadership School (NOLS), even if you won't use it in the wilderness.
It's like many first aid courses, but a little more advanced and with a focus on self-reliance for situations where help is far away. They're 2-day courses, typically $200-$300, and open to anyone. See NOLS.edu for more
More info is at the National Association for Search & Rescue (NASAR). Regional groups' Web sites aren't always easy to find. Google for "SAR" and your location. Here are some: Appalachian Search & Rescue Conference (MD, VA, DE), Ohio Valley (IA, IL, KY) <vsar.org>; and California.
