That is a problem and always a problem--however, more ways to get around the media and gatekeepers today exist. Furthermore, the media's influence is swirling around the toilet as they abandon news for advocacy. At the state level, I suggest forming state level organizations that develop connections or reinvigorating those in existence--do no rely on the NRA at the state level as they have their own agenda and usually use hired gun lobbyists and astroturf type campaigns. Instead, do the hard slog of contacting even those legislators who are hostile, develop relationships, testify before committees, arrange for hard to miss media activities, etc.Are they "smoked out" if the media never reports it?
At the national level, participation is more difficult and that makes it all the more necessary to band together for collective opposition, even if they do not agree with every jot and tittle of that organization's methods. Smaller, more honey badger type groups can also work. But you must spend the time which is the one thing that billionaires won't do. They will pay underlings and supervise them but don't expect seeing them at townhalls for candidates--they rely on money and bought persuasion for their acts. Long run, it can be fought by authenticity and mass popular support.