summer '71 southern Indy spacecraft sighting by 7 people

Summer of 1971 I was a teenaged camp counselor at Waycross Episcopal Church Camp near Morgantown, Indiana. It was a camp in the hilly, wooded area of southern Indiana. We had just put the campers to bed in the 6 cabins and 7 of us counselors (ages 17-23) were sitting on the bathhouse steps talking quietly, as we did every night for an hour or so after the kids went to bed. We could see all 6 cabin doors from the bathhouse steps and a wooded hill rose behind the cabins. Off to our left and on a small hill (in the mowed area of the camp) was the camp owner's ranch house. Suddenly a ham-can shaped flying object came over the hill behind the cabins and flew past us to stop and hover over the owner's house. It was about the size of the house and it had white-yellow lights running around the side of the "ham can". We were all shocked and we stood up and grabbed each other, asking what we should do. Two of the female counselors and one of the male counselors started crying and we were all talking at once. The craft hovered silently over the house for maybe 30m seconds. Then it rose up in the air and then zipped at an amazing speed back where it came from, over the hill behind the cabins.
Witness indicates that date of sighting is approximate.  PD