Joe, when are you planning this trip? I grew up in St. Louis but have lived in mid Missouri for over 35 years but still get up there once in a while.
One place I took Tim (PR57C) on our way to the last Homecoming was the National Museum of Transportation in South West St. Louis county.
https://tnmonot far .org/
It's not far off of I-44 and we both really enjoyed it.
If you want a place for lunch or dinner just off I-44, the Tater Patch in Rolla Missouri is the place to eat with plenty of hotels real close.
Try their pork tenderloin, it's a Midwest thing.
http://www.rollataterpatch.com/menu.htmlwPlease keep us posted on how this Junk yard road trip happens and of course we will need daily pictures.
Don