Very interesting notes about Deliverance.
My memory places it at the Dome, so if that's correct, it had to have been only the second or third film I saw there after moving from Cleveland, Ohio to Hollywood, USA. (The first was Frenzy, opening night.)
I didn't know anything about it, but friends did and they wanted to see it, so we all went and I remember feeling unnerved by it (for all the reasons in it) the rest of the evening. The next time I saw it in a theater was years later at that crazy one out east on Hollywood Blvd. across from the Pix or nearly so, on a zillionth run, perhaps on a double bill (possibly with Southern Comfort, which would be appropriate)...and it still had its impact on the big screen. Great film.