You are a member of the Montana Owners Club based on your assigned screen name, MOC number and ability to post on the forum. I am unsure what it is you are trying to join beyond that. There is a forum category of "Montana Regional Camping Clubs" with a number of somewhat subjective regional areas. These are not separate organizations with unique members despite the "Club" suffix. All MOC members are also part of and welcome at any of theses regional events.
Participation in the forum discussions will familiarize you with many of the members. Then sign up for one of the regional (or national) rallies to put faces with the names you have read. Each rally is announced well in advance and you are invited to attend. Just watch the active topics for the announcements. Much of the 2017 rally year is over, but in 2018 there will be a January gathering in: Quartzsite, AZ; a Western Region Rally in Heber City, UT in June; a Central Plains Regional Rally in July; a North East Rally in June on a private island in Lake Onterio; and, of course, the annual National Fall Rally in Goshen, ID in late September.There may even be more.
Hopefully this helps answer your questions.
Carl (n Susan) Youngren
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB