I took a Wilderness First Aid course - in fact, I took the instructor's course and was qualified to teach it at one point, although I quit the organization shortly thereafter due to being fed up with their internal politics.

Part of the course covered evacuation - the pros and cons of various methods of evacuation, such as horseback, travois, canoe, rowboat, ATV, how to select a good helicopter landing site, etc. We also practised building and carrying makeshift stretchers, how to carry them over rough terrain, how to rotate stretcher bearers so that they don't get overtired, and so on.

It was impressed on us that a WFA course is not a wilderness survival course. The distinction between regular first aid and wilderness first aid is largely a matter of how far from civilization you are. A regular first aid course assumes that an ambulance is 10-15 minutes, perhaps up to an hour or so, away and that your job is to keep the patient alive and as comfortable as possible until they show up. A WFA course assumes that an ambulance may not be available at all; if it is, it could be 10 or more hours away; and you may have to evacuate the patient yourself. But, unlike a wilderness survival course, it tends to assume that you know where you are and how to get back home.