Back in the late '70's, we ran at Tyler & Hallsville, TX. Paris was also running at that time. It's only about a hundred miles North of Tyler, but we never made it up there.
More than half the tracks we use to run, have long since been gone. I can think of at least 8.
Bracket racing allowed most of the small tracks to stay open for many years. And, obviously, most of the tracks today would fold, if not for bracket racing.