On page 130 of the new WDI book there is a very nice overview of an early version of HKDL:
This painting coincides exactly with the widely-released overview painting that gave the rear bird's-eye view of the park (a large version of which can be found in an old Disney Magazine) and both coincide very closely with the original press release (Phantom Manor, Toontown, etc.).
Using these three pieces of information, a magnifying glass, and some artistic license, I created a conceptual site plan of that first version of the park:
Here is a size comparison with the actual HKDL:
Anyone with eagle-eyes and the imagineering book, maybe you can you make out some things that I could not - there is something on Adventure Isle that looks like a spinning swing (like the silly symphony one), but that obviously wouldn't make sense.