i can understand your fears. there's quite a bit i don't share at well, but that's mostly because i don't often feel i have the sort of 'circle of friends' feel that i'd want before sharing certain things. on other topics/depths, i post freely, but i don't have anywhere near the influence that you do.
i'd be super worried also, if i were you, given the current political climate & how easy it is for less ethical people to cherry pick ideas from wholesome cultural change and use them for their own ends. i know on the feralculture forums they have at least two levels of 'privacy' in terms of who can see what - and i think they're using the same forum tech/program as you. maybe you could consider a protected forum within this one of people you know well enough to trust with these more fragile or exploitable ideas... that way they can propagate among those you'd consider best for holding your dreams for rewilding as sacred.
whatever you choose to do, i sympathize. i wish we were able to claim a few different areas around this country for rewilding & be doing all this work in person, spreading out into our local community, in a way that none of us would need to be doing this work alone.