When I leave I hope to have catastrophic insurance in case something really terrible happens, but otherwise I plan to just use local medicine and doctors. Sure, that might involve someone shaking a rattle over me and burning a chicken, but at least they care.
I don't know what I would do if I was over 40 though, or 50, I'm sure the choices become more difficult at some point when you actually start worrying about real problems with your health.
The best thing I could do for my own health is get on a boat and go cruising. I know from limited experience that I eat less, live healthier, etc, and that's the best kind of insurance there is.