Earthwalker - your posts are a bit confusing. Your profile says burning since 2012, but you talk of being a naive virgin. Either answer's fine of course, I'm just curious as to which. As for the questions in your posts, let me try to respond to them.
There are lots of different ways that people join camps. Some get new members through networks of friends. Some have open enrollment. Some take applications from strangers, but still require meeting people and being approved by members (or the camp leader). Others don't necessarily have open enrollment, but get new members from people who reach out and express interest in joining or participating. Not all camps who take on strangers or charge members dues are turnkey (plug 'n play) camps, in fact most are not. Regardless of any dues, I think a lot of camps that are working on a project (theme camps, MV support camps, art installation crews) have work duties and responsibilities that are shared among campmates.
You don't need to use quotes around camp, a group of people camping together is a camp regardless of whether they've registered, and regardless of whether they even have any kind of theme or build any art.
As for closed versus open camps, I think you may have some confusion there. The term open vs. closed is most often used to refer to enrollment. That is, do they have open enrollment and are open to new members, or is it closed enrollment and the only way in is through someone? On the playa, it's a different story. The terms I'd use to describe camps there is public or private space. Many camps are open to the public (whether it's a bar, or they serve pancakes, or offer haircuts, or have a space for meditation, or any of a thousand other things), but have both public and private space. There are camps (mostly unregistered) who have no public space - it's just a bunch of people who are camping together.
When registered theme camps submit their questionnaires, they can choose whether they'd like to appear on the list published on the Burning Man web site or not, and can also add links/contact info if they'd like.
There aren't any hard statistics available, but each year thousands of people find a place to camp by browsing through listings and posts on the internet, then reach out to a prospective camp to express interest. Thousands more connect with camp through the friends they're coming with. That's how my first year went, the friends who I was coming to the event with were organizing their own camp. Still others either go it alone or just form up their own things with friends.
I'm sure there are plenty of people who didn't care for the video. Of course it was staged, the project was planned well and they were all reading from the Dr. Seuss book. I look forward to seeing your video, and don't worry there will be plenty of people who don't care for whatever you make too (that's kind of the way it works with art).
And finally, yes those people are real. Some camps do have leaders and ranks and stuff. So long as something doesn't negatively impact somebody else's burn, do what makes you happy - and respect others' as they do what makes them happy.

