Charlie,
That's basically it! I even tried starting a hi-rail club a few years back but received no interest at all. There are a lot of us 3-railers here, but I guess most of them prefer to keep to themselves.
There is a new live steam group here, of which I am a member. We just finished installing a large loop of 7.5" gauge track in Boulder City just south of the Nevada State Railroad Museum site and work continues on additional trackage, steaming bays, turntable, etc. The group is part of the "Friends of the Nevada Southern Railway," a volunteer museum support group.
Contact me or check this link:
Nevada Southern Live SteamersElliot