Give a call to Deb Ajango in Eagle River, or call the previously mentioned Alaska Mountaineering School in TKA to get ahold of her. She offers lots of courses in state.
I've been a Wilderness EMT for 11 years, and a Wilderness First Responder for a couple years before that. I was an instructor for SOLO for a time when I lived back east. Almost all of my EMT practice has been in wilderness settings, including several years on an active mountain rescue team.
Once&Futr is correct that it is not a nationally or state-recognized standard. However, DOT which is responsible for EMT curricula and standards of care, does recognize a "wilderness context", defined as greater than one hour from ALS. In a wilderness context, certain parts of your standard of care are expanded, in recognition of the hazards of transport, environmental challenges, risk to rescuers, and long-term deficits from not treating injuries in a timely fashion.
These include clearing a spine that has positive MOI, reducing dislocations, restoring angulated fractures to position of function, and terminating CPR at 30 minutes, and administering food and water, to name a few. Your Medical Director or service will most likely make the final call as to whether or not they will authorize you do do these things in the field. If you are unaffiliated, I have always been an advocate for helping people first, and asking questions later.
Alaska as you may know has a "brother's keeper" law on the books, which basically states that if you see someone in trouble, you must render some sort of aid. Montana and Vermont are the only two other states with similar laws, owing to the perceived remoteness of each. (Other states probably warrant similar laws, but only these three have them at present.) Obviously, 99.9% of Alaska qualifies as a "wilderness context", which is why I think the "W" training is a sound investment up here.
A more significant part of many good WEMT courses is training to think outside the box, meaning that you practice improvising splints from on-hand materials, and so on. There should also be lots of emphasis on comfort and environmental considerations in the long-term care situation. A backboard with a hospital blanket is marginally-comfortable for a cross-town ambulance transport. Dealing with a 14-hour litter evacuation in sub-freezing temperatures and high winds presents entirely different requirements for adequately packaging a patient.
If you were an Army Ranger, then I bet a lot of this stuff would be pretty intuitive to you. As I said at the outset, Deb Ajango is one of the most active instructors in this state for Wilderness training. Get ahold of her and see what's available.
Cheers,
Denalipilot
WEMT
McKinley Volunteer Fire Department