Devils Tower National Monument in Wyoming & the men in black

oh yeah...actually before the film "Close Encounters" was released I saw something similar in size and shape as that big Mothership that was above Devil's Tower (but not as clear and defined as what I saw, it's light was so bright) come out from behind a mountain we were ca in the desert wilds of Nevada where I and a friend were mining turquoise (early 1970's),,,this thing was astounding and floored us! it then, flew off to a bell-shaped cloud about 20 miles away and disappeared inside, at which point the cloud sucked into itself and vanished...about an hour earlier, we'd watched 6 pair of 'craft' fly up the valley, between us the the far mountain range...3 out of the six had little red lights trailing them, and some would get closer or further at different times. Years later when Close Encounters was released and I saw that craft go to the toll-booth crossings and the little red light went thru, I thought to myself...yep! someone on the film-set had authentic info...true story!!!.....