I think they race at New Egypt.........
As for Etown I dont think they let quads on the practice track anymore. Unless they built another track.
As of last time I looked into going riding at Etown it was 50.00 for the day and you had to go in groups for 30 min then come off and not go again till your groups turn is up.
As for racing you have to check into the tracks rules. I know when I used to race at Etown you had to be a Member of the AMA, have full gear in good working shape. I dont remeber if you had to have your bike go through tech. I dont remember the race fee either. I havent raced in over 12 years. But going to start back up racing dirtbikes again once my son into racing.