Quite a list, Traveller, but I believe visiting Johnny Rosenblatt stadium is no longer possible. I know it was to be demolished once the Ameritrade stadium was built, and the land converted to parking for the Henry Doorly Zoo - a first class facility in its own right.
We moved from Omaha a number of years ago, but I still remember it fondly. We always found a lot to do in and around the area.