We are absolutely talking about the same storm. September 28, 1972. It was one of the first times I remember a weather bulletin interrupting TV programming. Legendary WMT meteorologist Conrad Johnson, with that deep baritone of his, cut into the equally legendary Max Hahn and his "Dr. Max" after school children's show. Before we knew it the sirens were going off all over Dubuque and you could hear tree branches snapping.
The trailer park you mentioned and the Supre 20 Drive Inn movie theater were severely damaged, for the second time in two years. The original Super 20, located near the present day Shopko store, was destroyed in 1970 and moved to a new location only to get hit again.
The tornado path accompanying your post was very long and wide for an Eastern Iowa tornado. It damaged or destroyed a lot of agricultural interests. Trees were down all over Dubuque, but there was no tornadic activity in the city proper and the path of the storm shown in your post verifies this. However, it was a very near miss, it did hit the outlying south and west parts of the metro area where you would have lived, and what difference does the nature of the winds make when they approach 100 miles an hour. Tornadic or not they will create a lot of damage.