This story from an obscure web site intrigued me enough to run some searches in my favorite search engine. The results pretty much validate the factual outline. The regular attendees since 1983 are indeed tech, media and investment moguls, plus senior federal officials, including from the intelligence community.
Whether the conference is just a “summer camp for billionaires” — as it is billed — or something more conspiratorial is hard to say. The conference event is widely reported, but the activities are not.
Being, however, inclined to conspiratorial speculation I note that the Allen & Company Sun Valley Conference would be an ideal venue for coordinating private-company censorship and propaganda strategies to align with government (or deep state) interests.