I was 4.5 at the time in 1977, and I remember walking through the parking lot with my mom to go see the first one. I don't have any memories of the theater, but I remember going. I've seen them all countless times, including an all day 3-movie marathon, and one attempt at an all-night run through.
Star Wars was pretty much the center of my childhood. Toys, movies, games in the yard. A good portion of my life as a kid. Good stuff, still one of my favorite movies.