Our camping group got started much like Mike's North Texas group. A couple families got together and went camping. They invited a couple more. And soon we were up to about a dozen or more. I think the most we've ever had on a trip was about 10 campers. So if you're in the mid-thumb region of Michigan, consider giving us a holler.
PS: Mike, wish we could have hooked up together when I lived down just south the Denton area. Did some group camping back then but it was a bunch of young engineers in tents, no families yet. Our best trip was out to Big Bend.