Columbiaville would no doubt be the best place in Mi to run.
I went there several years in a row in the early 80s.
It was incredible good racing. Two or three day event with racers coming all the way from Ca to run there. Gordon Paggett's was one of the fastest TFH teams.
That was the first time I saw a TFH carry the left sponson for about 1/2 the track. I thought...... "that dude has balls-o-plenty !!
I talked to a seasoned racer who was there every year and I asked him why the races stopped there. He told me that they had to pay off every government official and his brother to be able to put on the race at that site. So money killed it as usual.