On the list of tracks I'd like to see re-open; there is a dirt 1/2 mile at the Winnebago Country Fairgrounds in Pecatonica, IL.
They ran Badger Midget and Dirt LM races there, just over 20 years ago.
The fairboard does (or did, recently) have some interest in talking with a promoter.
https://www.winnebagocountyfair.com/facilities
It says the stands hold 4,000.
The "general" area no longer has nearby race tracks; as the dirt track about 20mins to the West in Freeport, IL closed about 15 years ago; and Rockford (paved), about 25mins to the East; closed just over a year ago (so there are still some race fans around; who are looking for places to go...).
What's left for dirt tracks (with possible racers and fans; who could maybe support another one)?; about an hour away (each); Darlington, WI runs on Fridays; and Sycamore, IL runs every Friday/Saturday. The mentioned partial season at LaSalle would be something to be courteous of. Otherwise, there are a host of tracks further to the west, in Iowa. Racers may not mind the travel.
I'd wonder if a few Sunday evening shows would work? But not against anything at Angell Park Speedway.