UFOs over Mentor Ohio Drive-in in 1960s

When I was a small child, my father and mother took the family to a drive-in theater in Mentor, Ohio.  I believe I would have been 6 to 8 years old, so the date is a guess.  It was a hot summer night after 10pm.  
We noticed that my father was hanging his head out of the car window and looking into the sky.  My mother asked him what he was looking at, to which he replied, "look".  My mother seemed concerned as did my father.  When we children asked what was going on, my father just said that there were some funny lights in the sky. 
I looked around and noticed that more than half of the cars around us had the adults standing outside them looking up at the lights.  We all got out of the car to look and at that point the movie was turned off.  Some people were yelling for the drive-in to turn off the lights so that "they" would not see us.  
We watched for over a half hour as a long, cigar-shaped object that blocked out the clouds illuminated by the moon.  It ca! me in parallel to the ground and then proceeded to turn upright so it was standing on an 'end'.  
Then over 10 shiny disc-shaped objects shot of the bottom and zoomed around at all directions and "danced" in the sky.  
After about 20 minutes they all shot back and came to a dead stop, stacking up like plates and then ascended up into the larger cigar-shaped object which then rotated again to be parallel with the ground and then it took off at a rapid speed and was out of sight in seconds.  
I distinctly remember my father referring to the large craft as a mother ship.  
We immediately left the drive-in and I listened to my mother and father talking about what they saw.  
I have searched the internet for any other reports of this.  
My sister and mother also remember this distinctly.
Witness indicates that the date of the sighting is approximate.  PD