Six Feet Under
Contributor
All you suggest is good....but where do you get a listing of "closest chambers" ?? .....still the weak link and list needed if the individual diver does choose to develop a detailed emergency plan and the verify the elements of that plan just before the dives...
You'd be surprised how many private chambers I've found local to me, for an area that "doesn't have any hyperbaric capability," just looking on Google. It would be a start, albeit an imperfect one.