I found some vintage HO scale cars on Ebay to populate the parking lot.
Again, you can see these cars parked in various places on the original EPCOT/Progress City model.
That rectangular space will be the home of the Amazing Sign.
I also got my hands on a vintage HO scale covered wagon for the prairie area. The journey west was fraught with hardship. A "flat tire" could mean the end for most settlers. Here we see an abandoned wagon, the victim of misfortune.
The Mine Train track has been raised to 10 ft above the ground and the golf holes have been laid out to scale.