According to Jerry and Elizabeth Marin (who were on the Gong Show), there was no way Chuck was in the CIA. They said he was a very gentle man, wouldn't hurt a fly, and pretty loopy on the whole. I used to like to talk to Jerry and Elizabeth about the Gong Show a lot. Yes, they knew the Unknown Comic without his bag, and yes, they still kept in touch with Gene Gene the Dancing Machine (this was back in early 2000s, probably). The last picture I have of Jerry and Elizabeth was from 2009.
Chuck Barris had one of the funniest statements ever, in talking about when the Gong Show got cancelled. He said something like, "The producers told us we had lost our perspective.*** I don't know, maybe they were right. When we started I was wearing a suit and jacket. By the end, I was wearing a tux with tails, a kilt, a football helmet and a holster with a rubber chicken in it."
***The act that went over the line was apparently the Popsicle Twins