I salute your efforts!
I became an "I" rated leader (I for "intermediate") in the Sierra Club maybe 15 years ago or so. I had to take a 2+ day first aid course, and pass tests in navigation (no GPS allowed!) and conservation, and lead two "check out" backpacks. This entitled me to lead trips on rough, off-trail, overnight, terrain, but not to use ropes, ice axes, and so on (except in case of unruly participants :-) )
A lot of people think of Sierra Club as just a bunch of noisy environmental activists, but there's another aspect which is leading outings into the wilderness to educate and inform people as to what is out there and what could be lost.
Down-side is no one ever gave me a blue shirt... :)