We were 18 and going cross country, 2 cars spending our nights at KOA's and National Parks.. We were stopping at places of interest and had stopped at a Park and we're sitting in the car smoking cigarettes and playing cards as the car was under a light pole. I looked out and saw delta formations of lights . Each formation consisted of 6 or 10 craft. We watched as they proceeded to put on an air show . It was obvious that this was a demonstration for someone . The actions of these delta formations was extreme in speed and directional changes . They would go to the stars and then return to earth, Then back to what appeared to be the main stage overhead, then dash to the stars . I remember that at some point they returned to earth , which due to the topography we could not see directly.We could see a glow that was beyond the arroyos, I think that is the term ,as the land was dry,baked and consisting of rises and gullies that we had to climb up and over only to find another gulley. I believe these are the result of rain and erosion. We eventually gave up , This was44 years ago and with so much now having been revealed, this air show was certainly meant for someone .I don't believe Area 51 was common knowledge. Certainly not to me. A footnote would be that with this same friend an enormous UFO passed his house, so close we could see figures in the windows.We ran into the yard and the entire family watched as it went at treetop height towards Edgemont High school. This sighting was in the papers as it was tracked from NYC.