Huge Disk Hovering Over Neighbor's Home

I was around 13 when this event occured and I will never forget it. I was returning from the county fair with my mother, aunt, and younger brother. As we pulled in to the driveway of my home, the headlights of our car were shining on a huge disk that was hovering above the next door neighbor's home. It had several different colored  lights on it and was absolutely silent. I can still remember the awe I felt. This thing was as big, if not bigger, then the house and so silent! As the car lights hit it, it began to slowly rise, straight in to the air, still making no discernable noise. We backed out of the drive and followed the object all over the SE part of town. It moved slowly and made random turns, flying very low the entire time. It then suddenly starting moving away at an incredibly rapid pace and disappeared before our eyes. It made a believer out of me!
Date is approximate.  Witness describes self as a successful business woman, and apparently works in an academic capacity.  PD