The basics of free camping are fairly widely known and available. They're covered well on kenkifer.com, and elsewhere.
But there are other possibilities, techniques and approaches that are not so well known and not so well covered.
[side note: the thread intends to include all forms of free camping -- guerilla, stealth, non-stealth, wild, urban, non-urban, etc. -- a wide and inclusive meaning of the term.]
Part of the meaning, for some people, is related to the spirit of a wild-and-free river.
(And perhaps also a return to a freer, less regimented, less controlled, more self-sufficient or self-contained, less facilities-dependent way of traveling and living, and of being in the world or with the world.)
There's room for further development and wider ranges of abilities, skills, and freedom in this area of touring.
Maybe some people have hit upon new, non-traditional or less well known possibilities?