Prices would probably be higher for the Labor Day Weekend, but we are pretty early (so prices might not be too bad). It's not like Cahokia Mounds or the Hopewell Sites will be inundated with visitors. The weekend of September 9th-10th should be fine. To share an idea of what the drive would look like here is a basic
Google Maps.
Highlights- Unity Temple in Oak Park, Chicago (FLW WHS)
*Tour is $20- Frederick C. Robie House at the University of Chicago (FLW WHS)
*Tour is $30- Early Chicago Skyscrapers (TWHS)
*high value sites in particular - Rookery Building, Marquette Building, Monadnock Building, Auditorium Theatre/Tour- Cahokia Mounds (WHS)
*7 million dollar Interpretive Center Renovation should be completed by Spring/Summer 2023- Hopewell Ceremonial Earthworks (TWHS 2023)
*high value sites in particular - Hopewell Culture National Historical Park, Fort Ancient State Memorial, Seip Earthworks, and Newark Earthworks State Memorial *Add-on Chicago: Mies van der Rohe Buildings
*Add-on St. Louis: The Gateway Arch
Other Tentative Sites of Potential Interest: (No activity for a nomination in last 15 years, unlikely to progress)- Dayton Aviation Sites (TWHS)
- Serpent Mound (TWHS)
Alternative Routes:- After Hopewell, heading South to Mammoth Cave National Park (WHS)
- After Hopewell, heading East to Fallingwater (FLW WHS)
- After Chicago
(skipping other itinerary), heading North toward Madison to visit Taliesin (FLW WHS)