I'm not from the US, but my two cents would be that anything you can do to protect yourself against surveillance can only be by the logic of protective barricades to slow down and make it harder for the state to pinpoint everyone.

A serious org will still have to work in the open, unmasked, getting in touch with random people and trying to agitate and organize them, etc. So there's a limit to how "anonymous" you can try to be.