You make some excellent points - everyone's needs are different, so my FAK will not necessarily be like your FAK. EMT training is an excellent idea, as is practical experience. I would only add that even better than service on an ambulance is time spent with your local SAR unit. If you live near the outdoors, you will learn a lot about survival, both directly and indirectly. You do things in the woods you would never consider when you are an ambulance ride away from the ER.